There is a reddit from a german reviewer that he is anwering some question.Its an interesting read, if you wish to have some of your fears adressed
https://www.reddit.com/r/Xenoblade_Chronicles/comments/7d5su6/i_got_a_review_copy_of_xenoblade_chronicles_2_i/
He also says that the resolution on handheld mode is poor, but I think he is exagerating a bit, because none of the other previews says its that bad.
My (locked) thread about how difficulty should be a decision for the developers, not the gamers.
https://gamrconnect.vgchartz.com/thread.php?id=241866&page=1