[Caution rant ahead]
I believe Reborn is going to face a balancing problem in next episodes. The core pokèmon games are built in a way that you don't have to really care about Ev and IV to beat the story and that's because you rarely go over level 60-70 when you face the elite four, so the bonus given by those mechanics is not too important.
In Reborn we will face the last gym around level 100, that's the ground where IVs and Ev training make the real difference. To keep the things difficult we have poor access to TMs and battle items (unless using the thief fling recycle tactic). It's getting kinda strange, every npcs have all the good tms and items while we have to suffer for one of them.
I am bringing this to attention non as a complaint but a thing to consider for the balancing of the game. One great feature of the core games is that you can beat it with your favourite team, as for now some choices are to be made and many pokèmon have to be placed in the pc because their expirance date in due while we finally have finally some good pokèmon to use, but they are fresh and new in an advanced place in the game, while I see my "storic" team rest because they are not up to the task anymore.
I don't have a good solution to this situation but I hope it can insipre some thoughs about it. I love this game more than the core ones and I wish it could grow to be even better.