Scrap IMO, but keep progress, for example if you are a rank 30 conjurer before the change you will be a rank 30 (whatever takes its place).

Adding additional classes on to a system which is already flawed is asking for trouble in the long term.

Yoshi-p has limited himself now though in saying he wouldn't wipe characters, but then can't blame him as the out cry if he did would be deafening.