I have often wished for this during arena grinds.
While I see the appeal in say when arena grinding or legends run, sp3s are supposed to have a animation. It's not worth removing/skipping it due to it however. I want to see my sp3s hurt the enemy. especially using Hyperions sp3 against himself . A sp3 is supposed to be a temporary pause in combat
I would be worried that if i pressed skip and the battle immediately restarts, that i wont be able to react in time to the opponent's next attack. At least by watching the sp3 animation you are given time to prepare to parry the next hit, etc.
I have often wished for this during arena grinds. why are you doing sp3 in arenas?