>>28056375XP share might make the game 'casual mode' but it has given me the opertunity to try out mons I never did before because they would have been a hassle to catch up with my normal standard boring team. In ORAS I'm doing abour 13 different Pokemon, and a lot of'em are ones I never used before like Loudred and Manetric, since they required more investment than I was willing to put into their shittier forms. And I'm loving the hell out of Manetric!
I hope the XPshare stays this way in S/M and the eventual DPPt remakes, because there are a LOT of Pokemon from Gen 4 I never even touched.