I like it.
Maynor is not a particularly sexy acquisition, but pre-injury he was solid. In some situations he was OKC's best option at the one. At least, that's what Scotty thought.
He plays smart defense and he can spot up from three. He plays a the pace game well--which means that aspect of the team strategy might not fall off too much when Lillard comes out. So, when we Batum in with the backups, the "flow" maybe doesn't completely disappear because Maynor doesn't play out of control or make many silly mistakes.
Ronnie Price and Nolan Smith have, for the most part, been absolute disasters on the floor. I like both players well enough, actually, but they aren't a good fit to lead a bench that has no scoring. They both need extremely reliable outlets to be effective. I think Maynor might succeed where they've failed.
If he does, it could be significant. He's a PG, so if he outplays his predecessors, he (theoretically) elevates the play of some of the guys around him. If the bench can become ever-so-slightly more efficient, that's big. If Maynor can find Babbit in his spots and in rhythm, that's huge. If Lillard can play five minutes a game less than he is now, that's enormous.
He's an upgrade, nothing to write home about, but could be significant to the second-half of season by not being terrible.