1 - PLAYER PRICE CHECK - perpete already answered this, not gonna happen.
2 - BuzzerBeater Auction - Transfer market should NOT be tampered with. its too fragile.
3 - New Comer/Manager in BuzzerBeater - I like this idea! Spend 2 weeks in a 'dummy' league where there are no ramifications for your actions, you can't buy real players, scrimmages only etc etc... yep would be a good idea.
4 - New Skills on Players - Game shape and Stamina are not the same thing - Think of it like this - When Derrick Rose comes back from injury, he will have great Stamina, but poor game shape. He will probably be able to play the full 48 mins of a game, but not very well..........A fat overweight player may have great gameshape which means he plays great for the time he is on the court, , but he has poor stamina so he can only last 30 mins.
Guards have Outside D (of which, Pressure trains) - this is what contributes to steals.
Some of the other suggestions here have been mentioned before and yer, your ideas are good.
5 - Staff Meeting - Yer I like this idea as well. very clever!
So overall, your first 2 ideas i dont like, they change the Transfer Market too much and thats a very fragile thing and will stuff up the BB-economy. All your other idea's are pretty good though! well done!