I would be for it, but I feel they would have to be so subtle that it almost wouldn't be worth it. Like say as a healer choosing between Regen having slightly more potency or an extra 6 secs of duration. However in the end as someone stated people would crunch the numbers (just look at BLM and that wall of math people pull out) to find what is the best. Sure if your not looking for end game raids or only play with friends I would welcome it with open arms to have my Regens last an extra 12secs or be a lot stronger (and maybe more MP?) to be unique but then if I were to get into raid groups they would eye me down and shun those who did not conform to the optimal choice.