My concerns are, how much xp is needed to level? Are all levels the same required xp to level? Are champion prices going to be toned down? Are champion shards disenchant value going to be similar or still widely various based on thier purchase cost?
As I imagine it the blue essence gains are going to be even slower than IP farming is now to make up some of the rune sink being gone. I also expect to see new players with few champions complain about getting the same low cost champs shards they have and rerolling into mostly cheap champs preventing them from unlocking high cost champs.