So far, fwiw, the best take on solving mana screw imo has been what the game Sorcery Contested Realm has done. You have a 40 card deck and a separate 20 card lands deck. In Magic you would start with 4 spells and 3 lands, one free mulligan in both decks, and then you draw from either deck for the turn. Cards would have to be erratad en masse to make this work in Magic, but I think Arena kinda solves it with "seeking" a land vs. a spell. I don't know how that works in Magic outside of at least smoothing an opening hand. The game would need to refer to the deck separately from the "atlas" of lands.