This issue has taken on all of the appearances of a contest over political turf - no longer having anything whatsoever to do with the issue at hand.
There is that, for sure. There are individuals who are quite jealous of their status as gatekeepers to the Legislature, and are unwilling to let anyone or anything pass that they didn't have a hand in.
We are apparently being warned that messing with the 30.06 sign's current wording will kill any open carry bill. How is it that merely modifying the Texas CHL into a license to carry a handgun is such a threatening concept to some folks ?
The concealed carry crowd don't want the same sign to apply to concealed and open carry. They're certain that at the first sight of an openly carried handgun, new signs will spring up like dandelions, and they don't want those signs to apply to concealed carry.
This ignores the fact that businesses that post proper 30.06 notices are few, and those that do post generally consult a lawyer to make sure it's legally binding. If open carry makes them suddenly sit up and say, "Hey, we need to ban guns in here!", then they're going to post both signs, not just one.
They do have some history on their side. When concealed carry first became legal in Texas, there was a rash of new "no guns" signs, most of them simple gunbuster decals. This was the case in most states that enacted new shall issue licenses over the last 30 years. The difference in Texas is that criminal trespass is easy to prove in court if a property owner takes reasonable steps to post a notice. What's worse, criminal trespass while in possession of a deadly weapon jumps up to a Class A misdemeanor (up to one year in jail).
That's a heckuva price to pay for not seeing a "no guns" sign.
The concealed carry crowd are perfectly happy to have open carriers face a year in jail for overlooking an obscure notice, just as long as the same notice doesn't apply to them.
The real solution is going to be an attack on the penalty portion of Chapter 30, the Criminal Trespass laws. I have some ideas on that, but I'm not going to post them in public yet.