It shouldn’t, and new frontend framework is far less important than the keyboard editor. Seeing that the rest of the boards for Kickstarter backers should ship in early September, that does not leave us much time, so Chrysalis 1.0 will still likely use Bootstrap.
Yep! Though the QMK-style tri-state (wherein if you hold both Raise and Lower, you get to Adjust) is not as trivial as it could be. And that is something Chrysalis may not end up supporting in the short term, either - but we are not quite there yet, so anything can happen.