Personally my panties are in a bunch because the number 13 holds a special, personal meaning and I would really like to see an authentic jersey with that number. I can't speak for any other bunches of panties. I love my team, and I love my state. Since it's the only major team we have left, i don't really have a lot of options.
As far as traditions go, I'm all for tradition as long as i know why they exist. Following tradition just for the sake of following something blindly doesn't make much sense to me.
I wouldn't be surprised to see some changes when Lou is gone. Does that mean I can't wait for him to leave? Not at all. The man is a legend and he's done a hell of a job. Just saying that when his time has passed, I'm pretty sure that will be the end of certain things (like the lack of players social media, no alt jerseys, etc.). This is also a business, and things like that can help when it comes to expanding fan base or merchandise sales. I don't think that it will make a change overnight, but it sure couldn't hurt the team either.