It's something that Wenger might go with. But I'm not a fan, personally. I'd rather we take our chances with Arshavin because if a run of games can get him into any sort of form, we'll be laughing because Nasri won't be missed.
If Arshavin's problem is, in part, confidence, then being able to start league games with Cesc and Van Persie and not playing the cup games with all the other rejects has to give him a reason to get his act together.