Need some advice for my next wad

[AtticTelephone]

I'm working on another Doom megawad, but I'm trying to improve the quality of the levels, since my other megawad (Waves of the Undead) is pretty much a lame 90's wad with lame levels. I didn't really care about using too many STAR textures, but I decided to care more about the style and combat in the wad. Is there anything I should know?

[kwc]

Some resources:
 

Offsite links:

Spoiler

https://twitter.com/the_Norberg
https://eev.ee/blog/2015/12/30/you-should-make-a-doom-level-part-2/
https://www.gamasutra.com/blogs/TomPugh/20181022/329044/Level_Design_Tips_and_Tricks.php