Oh, so you are going a different route.
Warning, ideafag ahead: The vision I got while playing was a sequence of small rooms where the game is slow and clunky like it is now, and you have to take down enemies in a puzzle-like manner. Bouncing projectiles prevent you from taking cover. Gryphons require you to get close while using cover. Suppressive fire plays an important role in both directions. Friendly fire and environmental kills are a big part of it. Sorry about shitting up the comment section with this paragraph.
All the rooms were consistently ok, because it was mostly the systems and random situations keeping it together. If you are going action roguelite route then I guess you can keep the room size as is except for rare gimmick levels.
I had no idea it can break root walls, that's neat.