100% this. I replaced all my old blum kitchen cabinet door hinges with new blum hinges when I painted them and all of the doors suddenly 'snapped' closed and stayed in that position. Replace all the hinges, you'll be happy that you did.

Not a problem. Good luck!

You would cut your length and angle with the first cut flat then you'd cut the back bevel cut on the crown against the fence so the miter joint is tight. Sounds easy but depending on your crown profile this could be rather difficult to achieve. Just an fyi

You can but you won't flat cut it anymore, you'll be adjusting your saw twice for every cut. I suggest you go rent a saw and avoid yourself a lot of frustration.