I would e-mail this direct to Best Buy corporate, but no e-mail exists publicly for that. I've read that the BB Corporate does read the forums. So...
I would like to suggest that Best Buy add some more benefits to the membership levels as an incentive to reach them.
Increased default hold time for pickup. Standard is 5 days. Give Elite maybe 7 days, Elite Plus 10 days? I know you can extend it manually with a click of a button on your purchases page, but it would be nice to know that from the start you have more days than normal.
Reward redemption rebate maybe? Amtrak gives you a points redemption rebate when you make a ticket purchase with points.
Lower denomination of rewards? E.g. redemptions down to 50 point denominations vs 250 ($1 vs $5)?
Return of rewards certficiates if you return your purchase for a refund (the certificates you get every so often for hitting a spending minimum on the Best Buy Credit Card that are not returned to you if you get a refund)