Doing things the right way is always worth the effort. And, actually, the rollback would have the least impact of the bunch, and the only one I can see a half-valid argument against.
That's assuming your desire is the right way. My opinion is that it is not. Rolling all units out at once would be a support nightmare and a disaster if issues creep up. You haven't given any reason IP based downloads would be any better than via the sat other than timing issues, and a free tuner/install when idle approach solves that.