Rather than spend his time trying to make this game appeal to ATG folk, I would like to see Bernie spend his time improving the interface for the people who will really be playing it.
So, with that in mind, here are some of my suggestions to improve the mystery card aspect of the game:
1) When the season is over, we get a reveal of the cards in the FA pool, so that we not only know which cards we have, we can see which cards were correctly and incorrectly dropped.
2) Maintain the "last 10 games" window on a card when it is sent to the FA pool. That can be really helpful in assessing a player (i.e. for a RP, did he give up 5 runds in 1 outing but pitch 8 scoreless innings besides that, or did he give up runds in 5 consecutive outings).
3) This is my big one, Put all injuries on LoMax! I hate that there are injury reveals. It would make the game far more challenging and interesting if all reveals were based on your intuition and experience in looking at the cards. Injury reveals detract from the concept of the game. I hate seeing guys get dropped after the first serie when they have an OPS of 1.200 because of a bad injury reveal. Let determining when to drop and when to hold be purely a metter of skill.
There are more, I'm sure, but these are my thoughts. I think if you improve the mystery componant, you will add more sales than if you water it down to attempt to draw non-mystery people.