In fact I've just replayed Doom, Doom 2, Heretic and Hexen in Doomsday 1.1.5, and had a blast - though even now, I still think that Doom 2 feels like a real slog at times
Hexen was fantastic, and it was the one game that I've never really replayed properly in a modern source port. In fact I've not really played it in any serious manner since the late 1990s. Hexen always in a bit of an unfinished state on modern source ports, with a few bugs, and glitches, plus it's seen the least attention in terms of models and textures, there's still plenty of missing textures and models for this game. Despite this, I had a fantastic time using the existing community resource pack, and thoroughly enjoyed the game. It's amazing how much you remember, even when you've not played a game for years, and also amazing how much you forget! I got stuck in a couple of areas.
So, on to the real point of my post. Hexen still misses the following 3D actor models:
(the final three would also count as player models)
Also there is no model for the following HUD weapon:
It was funny though how soon I got used to sprites. After a while I stopped really noticing. Still it would be nice to have a complete model pack.
In addition I encountered the following glitches (v 1.15)
Hub 3 - Heresiarch's Seminary.
In the courtyard area leading to Orchard of Lamentation is a switch hidden behind a tree. This switch activates four revolving doors, one of which leads to a storeroom containing the fourth shard of the ultimate weapon.
The doors are supposed to keep on rotating once the switch is pressed, however, after going through the first door, it locked behind me, and all other doors stopped revolving and became inaccessible. This makes it potentially impossible for the player to receive their ultimate weapons at that point, unless the no clip cheat is used.
Hub 3 - Wolf Chapel / Dragon Chapel
In Wolf Chapel is an 'atrium' area, that looks a bit like a stadium, containing an alcove at the far end, with an Icon of The Defender. Selecting this raises a wedge-shaped platform, and summons Dark Bishops. It also unlocks the final part of the puzzle in Dragon Chapel.
In Dragon Chapel is a passage (there are two such passages, but the first one is unlocked earlier without issues) containing two revolving pillars, which are supposed to move allowing access to the passage beyond. But when the corresponding puzzle is unlocked in Wolf Chapel, only one pillar moves. The other stays in place, but stops revolving. If No Clip is used to bypass the blockage, the glitched pillar then moves properly into place. This makes it impossible to progress without cheating.
On the plus side, all other hubs worked flawlessly. Seven Portals, which was pretty broken in v 1.14 is now perfect - or at least that was my own experience.
Hope this is of some help to you for future updates. Thank you.