I can't imagine you would have to do a full migration....long term data is not stored on the ssd anyway. You should be able to place it in maintenance mode, replace the drive as a "failed" drive, then bring it back in. I'll thumb through Cormac and Duncan's book, see if there's any data on it.
---here you go, read through this. http://www.yellow-bricks.com/2013/09/18/vsan-handles-disk-host-failure/
Personally, I would probably do a full just out of paranoia, but that's just me.