If you really wanted to put it to a vote, you should first vote on whether or not any change is needed at all. I'll bet 85% of HB would prefer to leave things the way they are now. Unregulated.
I do not think there will be any significant changes. Signatures that were egregious have been addressed in the past. Almost everything I see now is at least, tolerable. At the same time it would be good to set a guideline for people to try and limit themselves to. I don't think we'd ever say, "Hey, your signature is 26px over {arbitrary limit}. Take it off." However, if someone's put up a 1280x1024 wallpaper up there, then we are going to remove it. Additionally, having a youtube embed following every post is egregious -- although I have not noticed any cases of this, either.