Why is there so much hostility/dislike towards Renewal?

[Former-GM-Nara]

' I imagine all those hard working wizards that worked carefully, delicately and very very hard to get insta cast only for it to be taken way. Also, it prevents people from grinding on any particular monster like they do in WoW. So... any class that levels on low lvl monsters for a long time ex: Sage & priests, get shafted by it because once surpass that monsters level range they don't get any exp and can't go on to kill other things. Same thing goes in reverse, if the monster is too high for you you don't get the exp from it either. But it is also as Fruityla said, the game is very old and changing a old game into something different and still call it the same will never be liked.