Neither George or Butler were really available. If you wanted to give up 2-3 of Bradley, Crowder, and Smart, yes, we probably could have gotten one. But then you're left with a worse team that certainly stands no chance in the finals.
People need to let it rest and enjoy the season. Maybe we'll get past the Cavs anyway, or they won't make it to us. Or maybe they'll turn it on in the playoffs like all LeBron teams (with some help from the refs) and blow us out of the water, showing that one of Butler or George wouldn't have mattered.
Enjoy the team we have, not the one we don't. Otherwise, what's the fun?