About implementing Gen 8...
My opinion is...don't. It would be a huge amount of work and plenty of new mechanics to add: aside from the dynamax, we would have new Pokemon, moves, etc, that would mean remaking most boss fights as well (add Solaris a dynamax Tyranitar, for example). Not saying this would take time and that I'm impatient for the release, though, it's that Reborn already feels polished and complete that I don't think adding more would be necessary. Well that's just my opinion, and it's up for the designers to decide.