Didn't Game Freak mention that they were gonna keep main series games on handhelds? I'm pretty sure we don't have to worry about that, especially with Pokemon GO already coming out on smartphones.
Oh, forgot about that part. Shepherds did face great difficulty in maintaining the "goodness" of their behavior and mentality. That's why it makes me wish that the story writers would have added some event to aid character development, such as having Sorey almost get consumed by malevolence since they already touched on the idea before. This example is predictable, but they should at least put something that would add a lot more to Sorey than just being a static, simple, mentally strong good guy from the start. I know he was born with strong resonance, but still hard to believe he'd stay strong after being kept in Elysia for basically his whole life. It felt like he went through the story with basically no faults at all, and he merely became more aware of certain things. He did have the seraphim to help him out a lot, especially Lailah, so I guess that helped him stay pure. Throughout, he does learn the importance of their companionship, but there was more that they could've done imo... unless I'm forgetting something.