I think that you M-spells are fine without a reset. But, spells within an element should not be changed without a reset. (It screws with things and causes people to lose/gain skill points.) Even though it's not a good idea, you might get away with 1-2 as long as a reset was coming fairly soon after and they were on different elements.
So, feel free to do M-spells in new versions. Or any kind of balancing and bug fixing. In fact, a new version with just those three things would be really nice right now to replace the current buggy version. (Version 7.15 would be very helpful ATM.) But, save the item remake, the Water remake, and the rest of the various spell changes for the 8.0 reset.
P.S. I don't really know how to vote on your poll, so I didn't.