Ok, if you're only interested in the fanart it will work ok, but you'll have the same problem with episode descriptions. You might end up with descriptions for some of your episode. Like I said, I'm adding it as a secondary agent.
Also, I'll probably update the search function to use the name of the movie/series as presented by Plex's scanner, in case the file hash lookup fails (for modified files). Note though that AniDB's API search is only for exact name matches, so naming the files in that case are essential.