I think that the casting animation is cool I'd personally like it to remain. But they should lower it to 1 or 1.5sec so that it would be faster than a healer's cure and would actually work as an emergency healing tool. It would also render it more difficult to interrupt and make the PLD able to fit an oGCD right after the spell without clipping the next GCD (like Bards can do with WM on). They also should add a Surecast effect on Tempered Will (would fit the name and make this CD more useful). They could also add a regen effect to Clemency that applies to the PLD when used so that it helps healers over time. But insta cast I'd feel that it would be too sad to delete the casting animation, it feels like an actual Paladin casting a holy spell and that's a good thing for "player fantasy" like Sapphidia would say.