They should just go ahead and start season six with Beckett and Castle emerging from the chapel ready to start their married life together. Since all the fans are working overtime trying to figure out why the wedding couldn’t possibly happen, the obvious solution is to zag instead of zig. Not gonna bet a lot of money on this actually happening, of course.
I like the rest of the cast, too, though and would be seriously annoyed if they weren’t there. (well, except Perlmutter! 
)
I thought the proposal was contrived and manipulative. Seemed out of character to me and made me seriously mad.
I’m a huge fan of the show, too. I’m hoping this one doesn’t implode.