If you absolutely must have some expandy thing... I would suggest a lot less 'BAM I'M A BUTTON! LOOK AT ME LIGHT-UP!
Honestly, after a few days of longer sig areas, I was completely fine with it. Mostly because all the stuff that pops in and out, lights up, darkens, and whatever animations that seem to go on when I scroll are really distracting. It was nice to have less of that for a little while. But please make a choice and stick with it. I've had to update my sig every single time (I don't want my to need to expand) because every single time the visible length changes.
EDIT: For example, when I first made my sig, it was 3 lines at regular font. Then the area got slightly larger, so I went with 4 lines smaller font. Now it seems we are down to slightly more than 2 lines at regular font. Make up your mind, man.