1) Make RUC's easier to use. Let them clear immediately if X% of cabin is still available. 50%?? I've been trying for about a month to use 2 RUC's for a March Vegas flight. Cabin is wide open and no availability.
2) D1 mattress pads. Would make a world of difference.
3) Limit the Sky Club access a bit. The last few times I've been in JFK, LAX, and even MSP it's been a complete zoo.