Here is the deal with cutting Barron.
While Colombo is out, your only other tackle is Robert Brewster.
Brewster is without question worse than Barron. Brewster says he is in the best shape of his life, yet he easily has well over 50lbs of blubber on his stomach. (I saw him raise his shirt!) This kid is FAT and SLOW. He MUST convert some of that fat to muscle. Until then, he can't replace Barron unless you want Romo seriously injured. I will take Barron's holding call over Brewster flat out whiffing and Romo end up being roadkill.
Now, you also have Sam Young. This guy is raw, but at least he appears to be a fighter. I would be far more likely to replace Barron with Young than fat*** Brewster. (even though I would be extremely nervous with Sam in there too) The problem is Sam was injured and has even less experience than he could have had when he returns if he had played the entire preseason.
So, basically our choice is take the least of two evils. Right now, I have to go with Barron. Romo is far to important to this team to let Brewster man the right tackle position....