Originally Posted by SightseeMC

My one caveat to this advice would be that you probably don't have to burn your miles immediately. This will take time to play out, and then time to implement, and then time to accomplish. KE buying OZ is a big deal, and they won't be crushing anything currently running fine within OZ for months afterwards, and I'd bet 1+ years. That said, KE has shown they will give no notice before they announce changes (See what they did with their own program) - but still, most of those plans didn't start going into effect for some time.

So I'd plan to use miles sooner-rather-than-later, but I wouldn't book something now just to burn them.