This is awesome! 100% agree on everything. Sketch is SO CLOSE to being ‘perfect’, I hope they take these ideas and make it happen.
One of the things I would also love to see is the ability to set borders on rectangles individually. I can’t even begin to think of how much design time has been lost over the years drawing 1px lines under various items because there’s no way to tell Sketch (or pretty much every other design app) that I just want the bottom of something to have a 1px border and nothing else.