Update is out next Thursday.
They added act 4.
They're removing the cruel difficulty (previously you had to run through acts 1-3 twice consecutively, now you run 1-4 + 3 small "interlude acts" that serve as fodder to level you up)
They added new tiers to support gems and removed the restriction that stopped you from having multiple of the same type supporting different skills.
They added a new auction house system that allows trading buying items from other players with no need for them to accept the trade, so if an item is listed on the trade site you may always buy it instantly.
There's a lot of balance changes and additions to the crafting system, too. It's looking like a biiiiig patch.
time to line up for the slop!
I think that one is a good design decision. If you play a life based build in POE2 you don't have to waste half of your tree on life. That's one of the most creativity-stifling parts of POE1: every class has like 2 or 3 templates for trees that you have to start with, sets of life nodes that you have to grab. Every life based build has a similar shape near its start (grab all the life nodes near your start) then there's a few variations of which other life clusters you grab based on what direction you're pathing to. In comparison, POE2 has a lot more freedom because you actually invest in stats that are specific to your build (unless you're ES then you're in the same situation as POE1). The main thing holding back POE2's tree, IMO, was the way many nodes are pure pathing nodes that have no reason to exist except to make paths between parts of the tree longer; they're adding a ton of new nodes this patch so that problem will be reduced.
I agree with you regarding the 1 weapon type per skill restriction. It's very creativity stifling, and it means unique weapons are very pigeonholed into specific builds since there are a limited number of skills that work with each one. That could also use being more like POE1.