I do not want to see Battle Regimens removed with the new combat system. In fact, I want it to stay -- just make it more impactful with the status effects, and more streamlined. That's all.
It is VERY fun to have a full party chaining four different weaponskills for insane amounts of damage. Like so...
Maim > Doomspike II > Doomspike II > Thunder II on Kokoroon Quickfingers.
So much damage. So FUN!
Please do not eschew this, Square Enix.