you don't like redemption stories? Riddhe's motivations were pretty much the sort of oversensitivity and selfishness that came with being a young man from a powerful family with a major secret. didn't find it all that confusing.
the charter does not refer to newtypes. they said over and over that it was a coincidence. it isn't necessarily foretelling the appearance of newtypes but imagining that space living might change humans and human thought.
as far as the newtypes themselves, their power and why living in space miht affect them, have you not seen gundam before. the whole evolution is told gradually throughut first gundam, zeta gundam, char's counteattack nd other titles. unicrn is just the culmination f that.
you can infer that Madame Vist-Carbine was going to be taken into custody as the military officer who had witnessed her crimes firsthand ordered her to follow him into another room for questioning. that's how it starts.
and you an also infer from Banagher returning to his normal form after Riddhe's exclamation, mumbling Audrey's name and then turning back toward the Nahel Argama that he was going back to her. though implied, that, too was fairly obvious.