I usually save posting my impressions for one post.
But.
Holy-muthafuckin'-shit.
That Hell House was a monster. That fight was intense as hell, and no calling it a boss-battle doesn't do it justice. That felt like an optional superboss.
Every battle in this game commands a level of respect, awareness and prep that just demands your full attention and it's incredible.
But that fight pushed me to the limits. Oh my God. The spectacle. The intensity. The thing's sheer tenacity and refusal to just fucking DROP IT'S GUARD AND DIE. That thing was Hell, indeed. This entire arc so far has been phenomenal. The new characters are fucking amazing and the battles feel legendary. A fucking house-shaped weapon that torments you with neverending salvos of chairs, plush-toy bombs, and roof tiles before violently careening into you while it launches itself at you with a fucking rocket engine is the stuff you can't explain verbally... It must be seen.. and felt.
This entire arc is a fucking full course gourmet meal.
EDIT: One thing I want to add, and this is sorta late to be saying however it's exemplified in this fight.
Do not be afraid to use ATB and always be building it up. Do not be afraid to attack, even when it's just chip damage.
You can't be hoarding ATB because you will die. Don't wait til it's at 2 bars unless you need to spend it for a 2 bar skill. But you need to switch, use commands, attack, and keep going. Pressure must be consistent. Even when you're getting your face kicked in.
Aerith is good but bless her heart she definitely exemplifies a mage character. Had to revive her like 4 times this fight, and i know she limit broke 6 times. Like she was vital but you really can't expect her to handle herself and tank, so in order to build up ATB to heal, you gotta keep attacking. Even when you're afraid one hit will kill you. Don't stop. Keep attacking. The game was surprisingly lenient when you just are chipping away at an enemy. Don't run, just fight.
Steadfast Block is a fucking godsend too. That shit needs to be on everybody.