I think the content will be a bit harder (in the sense of the difficulty change between Asphodelos and Abyssos). I think they will be willing to do stuff like "enter a portal to kill adds" or "get transported to a cage" like in Alexander fights (because they mentioned this sort of thing specifically), but nothing widly out of the ordinary from the sort of changes we've seen already like "giant hole in the boss arena that affects uptime", "navigate a maze" or "stop attacking and try to move your character away from the middle or get killed" which were ideas they vetoed in Endwalker to maintain uptime.
Anyone hoping the game will suddenly be what they want in 7.2 is probably going to be disappointed, except the people who wanted another Field Operation.
I agree that being creative isn't always easy. At a certain point, even if they try to avoid it, you're going to be able to reduce their combat mechanics to basic principles like "AoE circle", "AoE cross", "AoE square", "AoE donut". That's why I say they are the bricks, nuts and bolts of the fight and that it's what they do with those bricks, nuts and bolts that matters.
For example, they could build lots of things with lego bricks. But if you just say "but they are the same old lego bricks", then you're never going to be happy with it.
They have actually been pretty creative across the game overall. For example, anyone that remembers how Copperbell Mines used to be, Copperbell HM, Sunken Temple (which is about to be changed, enjoy it while it lasts), old Sohr Khai. But even when they do something creative in the new dungeons, people farm said dungeon 100 times then, because they've done it hundreds of time, they no longer see it as creative.
That's really why a lot of things were removed over time. They ended up just being annoying in practice. For example, many players didn't like being unable to continue their (very inflexible) rotation, so they started to veto all ideas that affected uptime in Endwalker and people weren't happy with that.
Then we have ideas that people want back:
- multiple routes: people pick most efficient
- too many enemy packs: tanks feel pressured to pull them all despite being anxious that it's too many, then they wipe because it's too many (this was very common in ARR dungeons like Snowcloak)
- interruptable casts on enemy packs: 99% of tanks are unaware there are interrupts leaving all the heal burden on the healer
- not telegraphing mechanics: most players don't ever figure out the mechanics
- mechanics explained via status effects: many players (especially those that never played MMOs before) don't know to read status effect tooltips
- mechanics that affect uptime: uptime is affected, rotation flow ruined
- rotations too complicated such that a new player does it all wrong ie. wrong combos or casts.