I can't find back the Utility part of the conversation but....
Utility ideas could get interesting imo, if they decided to break some rules for the sake of a little identity finding.
They have broken their word before in not introducing "Action Mimics" from Bojza and Eureka into the main game; then they went and did it. aka Macrocosmos (which pretty much boils down to a reflect in disguise) and SCH Expedient (Breathtaker and Fleetfoot?). Sorry if Fleetfoot is wrong, I liked Eureka MORE than Bojza. They've also broken their work twice now in parsing down dots and buff because of "Effect-space-occupation-window-bloating" with Sage and Pictomancer. I don't know what they technically call those windows.
So imo, any suggestion is fair game as long as it not toooo over the top. I've posted these 2 examples elsewhere but I might as well share them here too. They both could be EXTREMELY useful or mildly useful.
Name Card: Y% Party Movement Speed + Lost Action Re-raise
Astro Unique: Does not stack with SCH Expedient : Time Stop from the Tower of Zot : re-raise trigger negates death but Freezes that party member for x#s. Party Wipe anyway is all are dead/frozen.
Now before anyone cries "To OP, that can be abused", I put this under Utility because it could be an excellent progging tool. I'd like to point out Lost Re-Raise is a 80% CHANCE. They've also put in none-cheese mechanics in most Boss fights since SHB, meaning no amount of abilities will save you or your party if you do it wrong, not even tank invuls. So you can not use this as a cheap thou those. Besides, no one actually wants to die, there are lots of penalties that should still stay in affect like damage down, Death Debuff Marker, and the Frozen gcd loss even when it's triggered. All bad things. Plus the really short window to activate it; I don't remember Expedient's sprint time is but it's SHORT.
Name Card: Party Debuff Cleanser
Astro Unique aka BRD The Warden's Paean but party-wide
Devs would have to be willing to bend a little on it applying to select enfeeblements that are otherwise not "Esuna-able". Given all the Bleed affects this expansion, I think this would have been a nice one even if you only got it and used it once in a boss fight with bleeds. It's can still be considered a utility style of mitigating Damage.