I am not sure where Baseball Mogul is going from here? An app would be significant. But not sure what additions can or will come in future versions?
There is always room for more stats (WAR?), but a more meaningful addition IMHO would be some attempt to include Negro League stars. Especially now that the Negro Leagues have been recognized as "major", it is past time.
It's a dead horse...
Probably, though waiting to post that until the day before MLK Day was perhaps not the best possible way to make the point. In any event, my thought is that it would do no harm to simply include in the player data base a dozen or so recognized stars with photos and notional ratings (that can always be edited to suit if used). Most would have "debut" years around 1920.