At least he's not playing 4.0. One of the Alabama teams had a former college player playing singles. He was destroying everybody at state and sectionals. (He even beat our singles player who we thought was pretty good.) I asked the captain if he was worried about the guy getting DQ'd. He said he wasn't worried because the guy was bulletproof--he had a computer rating. Their whole team was like that. They had been carefully recruited from around the state and they all had managed their ratings for this run at nationals. There was another thead about this, but this same guy beat another guy in the state finals, and the other guy (who lost) got DQ'd.
Welcome to the USTA, where former college players get a free pass and the weekend warriors get DQ'd. That said, 5.0 is mostly just a concept, not a real level. Unless you're in an urban area with lots of 5.0 players, League tennis really ends at 4.5. I'd be fine if they'd just change 4.5 to open. I think the USTA did it wrong when they bumped massive numbers of people up. They still didn't address the issue at the top, and it all rolls downhill. To really fix it, they need to:
1) Bump enough 4.5s to 5.0 so that 5.0 becomes viable. That would get the 4.5s out of 4.0 and so on, opening up more space in all of the levels.
or
2) Let 4.5 be what it already is--open tennis. That would push everyone down and make 3.0 much more viable. If they did that, you might even see some men's 2.5 teams. Right now, there is no place for a true beginner.