The biggest casualties are probably going to be my Scholar macros. I attached Embrace to... um... nearly everything, combined Rouse and Whispering Dawn into one button (I'm actually happy this one is going away, there was never any reason to use Rouse without also popping WD) aaand... I think I had a Largesse + Fey Illumination macro at one point but I never used it. Using both at the same time is kinda wasteful, I can't think of any situation where that much healing would be needed all at one time.

For my DPS, I have cooldown notifications for Mana Shift and Refresh that will be going away. I'm kinda going to miss it, I liked helping my party recover from deaths or just keeping them topped off. It's always so satisfying when half the party is dead, healers are running on fumes, but then suddenly Refresh comes off cooldown and we're back in business.
I'm curious to see what the end of phase 1 of Ultima, the High Seraph is going to look like in Shadowbringers. Entire Alliances still semi-wipe during the mechanics-vomit bit and I'm pretty sure at least like 1 in 3 pulls is saved by RDMs and Bards/Machinists working overtime XD