Honestly, I read the elders' comments about the table as relief that they had an excuse to stop the vote. If using a spell to repair the table would be fine, there's no way they're going to let the vampires know that. They're going to play up the option that is going to take the longest.
Also a lot of conforming tables could be made from one tree. They may well have made spares. It is the sort of wood that you can make a punchline out of.