Well I have suggestions:
Have the option to import other information such as developer and release date.
An option to choose which console is equivalent in Launchbox (eg "Atari 2600 cartridges" and "Atari 2600 cassettes" can be imported as different platforms but both marked in Launchbox as Atari 2600, thus making it easier to search for images).
An option to, when importing clones as separate games, create a custom Launchbox attribute "cloneof" containing the name of the original game (would help create playlists and filters).
An option to automatically mark as broken when importing games that are not supported (it would help to filter by so that, for example, in Launchbox it appears for editing and monitor when it starts working, but in BigBox when using it to play, it does not appear).