No problems for me.Replays is not a "finished" feature, so unfortunately adding all that is probably not going to happen. I'm sorry. :^( It may happen later, but for now no.
And it would screw up the numbering, however, there are Windows tools for this kind of thing, like
http://www.advancedrenamer.com/user_guide/method_renumber
Am I right in guessing nobody has had desynced replays since the last fix? @Lawnba
But are we going to get the unfinished replays in the final version of the game?
It's really useful for correcting bad habits and improving in general without recording the matches as a video, which takes up a huge amount of space.