Dude, he has been in and out the squad all season, I don't know what you're expecting to miraculously happen with him.
Schweinsteiger at this point will be nothing more than a luxury player for us (with his off-field presence more than anything), because we're not going to be able to build anything around a player who comes in and out of the team constantly.
Have you ever heard of key rotation. It's exactly what We did with Scholes. Your thinking is so binary, it's often not worth trying raise the point. There is a massive gradient between key player you build around and useless.