Trying to vault and it not working has gotten me killed a few times now. Allthough it can look hilarious when people try to vault and end up only jumping at walls repeatedly you should really have the following binding options:

-Jump/vault
-Jump only
-Vault only

I wish I could unbind vault altogether. 90% of the places I can vault, I'd rather just crouch jump over since it's so much faster. The parkour in this game is just ass.