I think the change is a good thing. Evocation is a better fit for channelling positive energy.
Also whenever spells are reclassified between editions I just imagine a bunch of board a apprentices in a stuffy lecture hall listening to a long winded professor tell them all about how "Early scholarship proposed that cure light wounds was a form "light necromancy" Hah! what a preposterous notion! We now know that it is merely channelling energy from the positive energy plane as discovered by..."