Man, I wonder if the next tier will have fights that take place on a flat circular or square arena, maybe they will even feel daring and make it rectangular.

Jokes aside, I think for regular content like dungeons and story trials, the pace of the fights is drastically improved from Endwalker, where it felt like there were long periods where the boss does absolutely nothing and just waits for death until the remember "oh yeah, mechanics" and teleports to perform it. In Dawntrail, there is less time where the boss just sits there and does nothing, which is nice, the mechanics themselves also have a bit more teeth to em, often resolving much quicker and being a bit more punishing, which is a nice change from EW as a whole.

I don't Savage raid anymore, so I will refrain from making comments about that, but in general, the first tier is always the easiest, usually so new/returning players get a feel for any job changes, 2nd and 3rd tiers are usually given a bit more oomph.