The most important small change for me is to make the 46.15 nonapplicability based on being issued a valid license, not having the license in possession. Just like a cop doesn't have to carry ID to be exempt. You may still take the ride but the DA would have no grounds to prosecute and get your CHL suspended or permanently revoked. Right now, you're technically guilty of UCW if someone snatches your purse with your ID, unless the gun is also in the purse. Stupid law!
The second most important to me is lowering the penalty for intentional failure to conceal. Making it a Class C misdemeanor is good but making it a $100 civil penalty is better. That's a big enough fine that people won't open carry and scare the yankees, but small enough that many Texas peace officers won't hassle someone who open carries on private property with the property owner's permission and isn't bothering anyone...but if they do, at least you won't lose your CHL over it.
Third is making it a defense to prosecution or exemption for all of 46.03 and 46.035 if they don't post a 30.06 or 51% sign.
Campus carry is a distant fifth or sixth to me. I don't care about a parking lot bill.