The notes are stupid long, so I'm not gonna try to copy paste them here. However, here's an overview:

New Frames/Weapons

• New frame: Dante (rot C new disruption node or via pity system)
• New incarnon weapons: Onos (secondary) and Ruvox (melee: fist)

Starchart & Steel Path

• New Deimos node: Armatus (Disruption)
• Disruption QoL changes: demolisher marker shows up much more easily; red conduit now yellow
• Omnia void fissures (can take any tier of relic in)
• Steel Path Zariman & Cavia bounties
• Steel Path incursion expansion: Zariman and Albrecht’s Laboratories now get their own 6th daily incursion

Albrecht's Laboratories tileset

• New enemy: Gruzzling, drops lanthorns, echo vocas, common melee arcanes, and are an additional source of conduit activators on Armatus
• Tileset expansion; includes new somachord tones
• Netracell drop table changes (removed all the non-legendary melee arcanes & adjusted drop rates of remaining items)
• Some enemy adjustments, including Rogue Bonewidows (which also applies to iso vaults)

Sanctum Anatomica

• “Research Dante” store (Loid), which also includes riven transmuters and a new Simulacrum that lets you bump enemies an extra 25 levels
• Weekly archon shard offering moved to Sanctum Anatomica (Bird3), no longer on Chipper
• You can hug Fish, Bird, and Emo now.

Duviri Improvements

• Top QoL changes: circuit progress now saves between rounds (!); you can leave the undercroft waiting area as long as the timer hasn't started
• Circuit Assassination: Corrupted Jackal changes (nerf)

Cosmetics & Customization

• Styanax Tonatiuh collection
• Tennogen Unbound (6 things, including Sevagoth and Gyre skins)
• New market bundles: Dante, Inaros cosmetics, voidshells (Banshee, Loki, Nekros), community glyphs, anniversary glyphs
• Redliner emote
• Customization for frames with invisibility abilities (under attachments > auxiliary attachments), lets you choose between classic transparent and just kind of an energy glow
• Haztech & Smelter suits can now be worn by drifter

Frame Reworks & Changes

• Inaros rework
• Mirage Eclipse & Prism changes (no longer reliant on light)
• Gara passive change (no longer reliant on light)
• Nourish Helminth change (nerf)
• Loki ability changes (decoy now scales; switch teleport no longer roots, and also gives a speed boost)
• Yareli ability changes (no longer rooted when casting aquablades/riptide)

Upgrades

• Archon shard expansion: Ascent Fusion (combine 3 of the same shard into a tauforged)
• New warframe augment mods for Baruuk, Chroma, Citrine, Kullervo, Lavos, Loki, Nezha, Nidus, Styanax, Excal Umbra, and Yareli
  Click for augment list
• Elusive Retribution (Baruuk - Elude): Every attack Baruuk Eludes increases his Melee Attack Speed and Melee Critical Damage by 5% up to 6 stacks. Stacks last 6s. (Hexis/Loca)
• Guardian Armor (Chroma - Vex Armor): Chroma's Health takes 50% of damage dealt to allies within Affinity Range. Squad kills restore 5% of his Health over 3s and increases Vex Armor duration by 1s. (Suda/Perrin)
• Recrystalize (Citrine - Crystallize): Enemies killed by crystalline growths stagger and spread the crystals to enemies within 16m. (Red Veil/Steel Merid)
• Wrath of Ukko (Kullervo - Storm of Ukko): Wrathful Advance moves the storm of daggers to the teleportation location and increases its duration by 6s. (Loca/Steel Merid)
• Valence Formation (Lavos - Passive): Upon Ability cast, applies the Ability Element as 200% Elemental Damage to your weapons with guaranteed Status for 20s. (Loka/Red Veil)
• Damage Decoy (Loki - Decoy): Decoy can be cast on enemies. Enemies who attack that decoy receive 5 random Status Effects, and the reflected damage is increased by 350%. (Hexis/Red Veil)
• Divine Retribution (Nezha - Divine Spears): When a speared enemy suffers from a Status Effect, the Status Effect spreads to all speared enemies. Spear explosions apply 1.5x Status Damage. (Suda/Steel Merid)
• Parasitic Vitality (Nidus - Parasitic Link): Nidus and any ally he's bound to gain 4% Max Health per Mutation during Parasitic Link. (Steel Merid/Perrin)
• Axios Javelineers (Styanax - Axios Javelin): A pair of Styanax Specters spawn to throw javelins, creating vortexes on impact. Impale an enemy to increase vortex duration by 5s. (Hexis/Loka)
• Warrior’s Rest (Excalibur Umbra - Passive): Umbra's Ability Strength increases by 15% but he no longer fights independently alongside his Operator. (Hexis/Red Veil)
• Loyal Merulina (Yareli - Merulina): You no longer ride Merulina. Instead, she follows her and casts Sea Snare on nearby enemies. 2s cooldown. (Suda/Loka)

New Player Path Improvements

• Cephalon Simaris introduction improved
• Mote Amp acquisition improved
• Junction changes
• Inbox messages more correctly mastery-rank locked
• Railjack market bundle changes (removed some bundles, and added a new, better one for less plat; differences in plat will be refunded)
• Quest changes (including reducing quest item build times to 10 sec)

Melee Attack Changes

• Melee ground slam attack changes: only radial damage (max 50% falloff at edge), scales with mods
• Melee finisher improvements (new vfx, more enemies can be finishered)
• Auto-melee fixes (no longer will I get stuck perma-meleeing in circuit... probably)

UI QoL changes

• New UI sorting categories for arcanes, captura, and orbiter deco
• New fast travel menus for orbiter, relays, & dojo (same as gear button) (includes Baro!)
• Upgrade screen changes (some nice little tweaks)
• Warframe, weapon, And railjack stat UI rework (honestly it seems mostly the same in practice, but you can now see some extra handy stats if you've equipped mods that affect them)
• Incarnon reticle improvements

Visual Updates

• GI Volume Lighting updates (now applies to orbiter and some other places, as well as transparent parts on frames)
• Kubrow fur updates

Other Additions, Changes, Fixes, etc.

Some highlights:

• Sticky corners begone!
• Applicable ammo pickups will charge tome alt-fire, instead of being useless for that weapon class
• No more being locked out of companion pets when incubating; also imprint QoL#