Seems like someone wants to get roasted. First of all you are a level 80 dancer main commenting on a healer forum about healers on what they should or should not do like you actually know how to play our job. Just because you have a level 80 dancer you have no right to talk about healers
Secondly, just because you made level 80 or have a low level healer, this is not my only character and I have played a healer since the beginning and won't be my last. You comment on how an 8 second cast time is plus an ability that has an even higher cooldown with a massive mana cost is better for the game than a 30 second off global cooldown rez with no mana cost when you only have 10000 mana. The problem is if people want to cheat or cheese 24 man content and not actually put any effort into getting it done, then perhaps they shouldn't be doing it. And if, you are doing an 8 man raid and people are dying multiple times, then those people shouldn't be doing the raid either. Then those people should not be in the raid either and take time to learn their role or job and take time to learn something in the first place. Did you think that SE made these 24 man raids so you can cheat your way or bug your way through by setting yourself up with 8 second cast time standing still and getting yourself killed in the meantime. With my suggestion, you have your resurrection spell and swiftcast merged and it is just the same if not better than it currently is in the game now. Does it make it easier, yes but it is annoying and awkward when you are in the middle of a rotation and you have to swiftcast rez which disrupts the flow of damage which is terrible game design. Most red mages and summoners find this very annoying and why a lot of them don't like doing it. You can ask any summoner since the beginning of this game, do you like rezzing people in the middle of a rotation? They will say no.