There have been a lot of noise on Jeremy Lin's performance. He has been performing worse and worse, his time on court is less and less.
I believe that he found the formula that works, with Harden. But he is very smart, realizing that he can't go out with Harden to battle night after night; they will get beat up, get injured before the playoff.
Basketball is a team sport, there are ten of them in a team, there is no reason that starters work very hard night after night while the bench gets stale; he is training his teammates, one at a time; that is why people see this night one of the previously unknown Rockets got on fire, the other night the other Rockets got on fire. Rocket bench has more time on court than ever.
He used James, Bryant, .. to 'practice'/train the Rockets' bench. They only need to keep their score around the water mark. Just before play off time, they work harder to get into the top five teams. By that time their bench has lot of 'battle experience' , they are very near the starters' level. They will be very dangerous; they can fight on their own and the Rockets will not rely on the starters a lot.
Wait and see my friends! there are exciting things ahead! Ball hogging stars, teams with very few elite players are endangered species.