Hello..
You can revert the hypervisor as an option but it depends on where it reverts to.. You can use the shift + r option to revert hypervisor. Easy way to identify if the hypervisor is showing same builds ..which gives some clue if you can recover or not..
Removing vib is like removing driver on any other os. You can reinstall it back on esxi. You can download it and keep it in local datastore prior to removing it makes it safe way for you to install it.
Note: if that driver is used for network or storage then they will be disconnected until it is reinstalled and configured back.
Thanks,
MS
