Sorry, but there is no solution to be found, as there isn't really a problem that hasn't been there since day 1. I'm not totally sure but I think /click is only a recent thing, before that, everyone did it the old school way. And now they are forced to go back to it, oh well.

Every class has a rotation. Meaning they go through the same order of spells repetitively. It may be 5 spells (prot pally) or i may be 20 spells, but each class always comes back to a starting point (cast sequence that rotation). You can still do very decent dps without click, don't worry about the removal, it's not the end of the world, back to old school it is.