Not enough levels to give it a chance to get complicated enough, which makes it a bit braindead. Often repeated the same few routines every level, such as loading guns the exact same way or healing/hurting yourself to use up healing/harmful items in the same loops.

Finished floor 25 boss on expert using TT/AAA party composition. Self-imposed challenge, don't do it, pick a normal comp. Stopped here cause this team is not suitable to explore the post-game dungeon and I was ready to move on to the next Etrian.

If you play it like a normal person should you'll have a fun time dungeon crawling and exploiting enemy weaknesses. Consumables more than adequate to fill the gaps in most party comps. Mapping tools work well for the first half of the game, but become woefully inadequate on the back half.