Just noticed thus far a few problems/missing things from the Lions database. Haven't quite figured out how to use the editor so I can't add them myself.
Only things that have stuck out for me thus far was the "Royal Standard Bearer" not having his "Oriazur" artefact available, which is basically the only point to having this figure:
http://www.rackham-store.com/site/Cartes/ULIPE04-B.jpg
Then the "Paladins of Alahan" not having the option to add the "Champions of Justice" or "Champions of Virtue" abilities:
http://www.rackham-store.com/site/ULIEL06B.jpg
Sorry if these are things you are currently working on, but if you happened to miss them, then I hope it helps. Otherwise things are looking really great and I am having a blast with Army Builder and setting up lists for my battles.