Visited a Heat game, had a fun time. Speedy security check, not too crowded inside at the facilities (a lot of places to buy drinks and food, clean toilets).
We parked at the other side of the street, at the Bayside Marketplace ($15) 2 hours in advance. Had dinner there and strolled around.
My tip: have a drink at the Bayside Marketplace near the water, enjoy the live music and go to your car after that. You wont be in the crowd of people trying to get out of the parking, and will have no traffic.