you're basically describe a pretty good/decent team. those types of teams need things to fall. basically, we are a long way away from contender status. great teams don't need shots to fall to win games most of the time. they get stops on the other end if they don't make shots.
http://www.thedreamshake.com/2010/11/4/1793325/the-future-is-still-bright-for-the-rockets This is encouraging. Somewhat.
This problem needs to be addressed. It has to do with more than having a closer. The team is falling apart as soon as the 4th quarter starts.The team nor the coaches are on the same page in the 4th.