1 ultimate instead of 2 ?

[ForteNightshade]

Thats the point

Its supposed to get harder, become more prestigious

Except making it longer achieves neither. Tacking on twelve more minutes to UCoB doesn't make it any more prestigious nor would it be necessarily any harder in terms of actual challenging mechanics. It's simply be mentally exhausting. Content still has to be fun and engaging even if it's difficult. There comes a point of diminishing returns where something takes so long it just isn't fun any longer. You also run into creative limitations. There is only so much the devs can come up with when designing a fight, especially one of this magnitude. Eventually, they'll just be throwing the same series of mechanics at players to pad out the length because they've simply run out of ideas.

I much prefer having UCoB and UwU, two very distinct and different fights in theme, concept and execution, then for UCoB to be a 30 minute slog I'm too exhausted to even enjoy by the time I clear it.

[CaedemSanguis]

Except making it longer achieves neither. Tacking on twelve more minutes to UCoB doesn't make it any more prestigious nor would it be necessarily any harder in terms of actual challenging mechanics. It's simply be mentally exhausting. Content still has to be fun and engaging even if it's difficult. There comes a point of diminishing returns where something takes so long it just isn't fun any longer. You also run into creative limitations. There is only so much the devs can come up with when designing a fight, especially one of this magnitude. Eventually, they'll just be throwing the same series of mechanics at players to pad out the length because they've simply run out of ideas.

I much prefer having UCoB and UwU, two very distinct and different fights in theme, concept and execution, then for UCoB to be a 30 minute slog I'm too exhausted to even enjoy by the time I clear it.

It will be way harder, and less clears, so it will be more prestigious to have achieve a 24mn-27mn lenght ultimate fight

[Nestama]

It will be way harder, and less clears, so it will be more prestigious to have achieve a 24mn-27mn lenght ultimate fight

Time doesn't make the fight hard, though. That's what the mechanics are made for.
Making the fight last 30 minutes forces everyone to make sure they will not be interrupted by IRL stuff (such as suddenly needing to go to the bathroom, or your child needs you for something while you're 24 minutes into the fight, etc). All Ultimate needs is difficult/tricky mechanics.