Hall of Famer
The inverse would certainly save more time. Obviously, you'd still have to have commercial breaks, though, so I don't think it's a very viable option.
I will say there is a lot to be said for the soccer model's predictability as well as the ability to neatly package a broadcast into a two hour space. NBA will always have the threat of overtime but you have to figure people don't actually complain that a nail biter is running too long.
I suppose other alternatives would be only using these "quickening" rules for the regular season. Or weekday evening games, though that seems awfully arbitrary.