The one improvement I want is a tweak to what duties are available when. Currently you're locked to only level 60 duties and below, until you reach 90 and upgrade.

If they can't adjust it to have more grades of content unlocks, then I think the starting state should include duties up to 70 (as the player will be moving into 60-70 content soon enough) and/or you unlock the higher tier at 80.

Probably just starting out with more things in the lower tier would be better. Having the level 90 trials visible in the list is some instant spoilers for Endwalker.