From my own experiences my problems with astro pretty much breaks down to, Noct sect is too mana expensive for what it has. Once I realized that blue is melee and red is ranged the cards lost all meaning. As someone who genuinely enjoyed the lore it saddens me to see that it's been made effectively meaningless. Also doesn't help that I often find the seals not applying even if the person has gotten a hit in or two.

White mage for me is lacking a proactive way to build blood lily, I regularly over heal with the afflatus just to not have 3 up, maybe a shield or a damaging ability. It'd be nice to have a damaging aoe again like aero 3, perhaps kill 2 birds with one stone and have an afflatus ability that spreads dia. Whm feels the least affected for me at least but I think that's mostly from already having lost so much in Stormblood (still a tad salty that 7 of the 10 role abilities were once WHM) but whatever in the past.

I wish I could bring something to the table for SCH but it's the healer I have the least experience with, almost zero time spent (the pet stuff always seemed so daunting).

Mostly though my biggest problem so far has been the seeming lack of response from the dev team. I don't know the scale of feedback but I did see with the last live letter how many questions were posed and no response, not even some much as a "we're aware" or some boiler plate "Listening to feedback and making adjustments". The sound of silence is deafening, I'd appreciate any level of awareness even if it's just them dismissing us, anything but silence.