To be fair, most of the FF4 Bosses had the same gimmicks in FF4DS, just many of them were tweaked to be more annoying. No guys, Rubicante having Scorch be MT and heal him is not fun, especially when elemental weakness is now 1.5x damage across the board instead of 2x on some enemies, 4x on others...and the "physical weapons ignore cape" feature is gone.
The one fight that had a change that I actually approve of is Golbez. Making him a Barrier Change boss turned him from a generic fight where you start with dead PCs to a legit fight that encourages reviving the other characters, while being a defensive gimmick so you don't feel all "OH GOD I CAN'T RECOVER FROM THE PLOT STUFF!" He's not worthless offensively, but you definitely feel like you have time to recover.
Honestly, FF4 fights do tend to bug me as well. Rubicante again pisses me off simply because of the Cape Mechanic is so annoyingly handled. Not only do you have a charge time on everything possibly leading into smacking him when the cape is up, his cape coming down is a random chance, so you could be sitting ducks while he's just wailing on you if the RNG hates you.