Yes, to add to what Wolstech already said, a lot of our VPS users that signed up since cPanel revoked our licenses did so as a temporary measure to keep their websites online while Plesk was being installed. Like Wolstech said some of them will likely switch back to shared hosting once it's available.
I should also add that no one is being downgraded without their permission. If they're happy with their VPS service they can of course continue using it. Some people choose to have a shared hosting account in addition to their VPS as well which is fine too.