Large attack delay gets in the way of micro and player control/enjoyment, just look at player behavior. there is a reason that I have not used sharpshooters more than twice, rarely see them from other players and carbine cavalry sucks to use. its also a major reason why bolas warriors rarely see play and many wish for skirmishers for the British/dislike for c.a.
It harms melee units as well, as they must complete a long animation as their targets continue running rather than dealing damage immediately and and continue trailing as their R.O.F. finishes, like zealots in sc2. if hussars dealt damage as soon as they reached a target and followed that target instead of standing still, it would make them much more effective and easier to control. ships also suffer from a delay before firing and it makes them unfun to use/micro. I avoid using ships when I can just because how janky and unresponsive they feel, which is never a good sign for a game that is supposed to be fun.
removing attack delay from these units would be a major QOL upgrade, making them much more player friendly. I also I hope the new units don’t follow their example.
if large attack delays must be included with the new units add it to Caroleans and Cassadores as well, they both move fast and making their staple units unfun to use would reduce their play/win rate.