I've said it 50x since the presentation but this has to be the worst looking beta 1 out of the lot. Naturally, me saying this will bring out the apologists telling everyone that "it's just beta 1" and that "a lot of things can change before GM" -- but my real problem with what we've been shown is that it's the awful foundation on which they will be iterating.
Will things get better? Presumably they'll refine and refine until it's to an acceptable point design-wise, but I cannot get over the fact that THIS is what they decided was ok to show the public. Music? News? Control Center? Notifications (and the hilariously absurd new swipe down for notifications screen), Messages (L O L) -- it all smells really bad of design by committee. It also feels as if they're trying too hard to bring over concepts from watchOS to iOS without considering that that sort of rationale is just plain wrong. Same with trying to fit the same interactions and concepts that a phone has to the tablet space. I for one was a huge fan of the flat look, the edge to edge artwork, transparency, fonts of the thinner variety, overlays and having a sense of depth without being incredibly literal about it.
With all that being said, it seems as if right now Apple is in the midst of a really radical shift in design. They've always been a stalwart in both user experience and user interfaces, and it's sad to see the cracks really starting to show as they continue to trot out what I believe to be a more fractured experience overall, and whether that eventually punctures enough holes in the ship to bring it down has yet to be seen.