This is incredibly short-sighted. You're talking about 1 user 3 months, and you think that's "big" ? I'd say it's a much bigger loss if the project gets kicked out because of one person's impatience. Then everybody will have to wait forever, how is that better?
If the fs is as good as you claim, then you better play by the rules and make sure the project survives and eventually goes GA. If it happens a few months later, then so be it. Think about the long term.
If you're worried about a single user leaving, then a much better strategy would be to explain to this user the Linux release timeline, or how to apply a patch, than to go up toe to toe against Linus.
And btw, squeezing a fix/feature in at the last minute in order to help one user is not as good as you think it is. Even if that one user appreciates your responsiveness, to everyone else it sends a message that the key dev is super impatient and unprofessional. So even if you manage to keep that one user, how many potential users are you losing by sending that message?