We might see more from him in the 2nd half of the season. But you said it yourself YPC is very similar. Gurley has a longer biggest gain. The only teams that they both played against they were very similar. I think it's like a lot of other things, it's fun to pile on TG so people do it. Henderson might end up being better for us but right now they're not very different. Each was bad against Atl and each was good against Cincy. As for the changing out during a series we haven't seen McVay do that much at all this year. When a back goes in for a drive they almost always stay in for the whole drive.
Also McVay is planning on using all of them if people bother to follow the teams reporters.