I've stopped working on the version as is available now because it's simply too much for me to handle. Between full time work and developing another mod alongside this map burnt me out a bit. The limitations of how doom maps also presented a lot of issues. I also felt personally a bit exhausted after it took me an hour and a half with vanilla doom, and nearly an entire day with hdest.
I've started over though and I'm going to try a hub approach rather than a big seamless map. I've also taken the input I've seen some people who played it who I could find on youtube on twitch.
Album for other screenshots:
https://imgur.com/a/VoNyjVl
Out of curiosity, do you plan on eventually giving E2, E3, and/or E4 the same treatment?
With this design, I'll be adding the first mission of each episode plus doom 2 levels. For now I'm going to aim for a hub that redesigns than the first three maps and see how that goes. I need to include some furnishing and details to the rooms this time as well.