And yet the Kex engine still doesn't offer QoL improvements like multiple quick saves, auto saves, and control configuration is very limited, especially for mods/games that offer extra controls like jumping or inventories. No free mouse look or free aim.

Cross multi-player is neat but it was running kind of janky when I tried it. There's also a pretty severe bug that enemies forget what state they were in after you load a save (they default back to idle). I don't think that was an original bug, other ports (and pretty sure this one prior to this update) don't have that bug.

I get that Doom at this point is more community platform than game, but other ports make clearer their intent at either upgrades-and-options (gzdoom) or attempting to stick close to the original (chocolate, eternity). I don't think the Kex port makes clear it's position on this. Controller support, cross-multiplayer, and some graphical options (like the weapon icons) make it seem like a QoL port but then things like no freelook make it seem like it wants to also be traditional.

Edit:

I feel like I've only talked about the engine a few times now. The new episode, Legacy of Rust, is excellent and a worthwhile addition to the core game. New enemies slot in well, new weapons are fun, and mainly the levels are just gorgeous and extremely hard. I muddled through episode 1 on UV but episode 2 stomped my face in right out of the gate. They weren't playing on this one. Lots of nice touches too like brand new inter-mission screens, some new and expanded texture work, and the architecture is just really stunning. Some of meanest archvile placement since Plutonia as well. I really can't recommend the new missions enough, though I might see if they'll run in GZD, haha.