The thin black outline makes a massive difference - massive. The old one (without the outline) was not easy on the eye as you could not make out the white number from the yellow sash at times. I'm surprised they didn't think of something so simple ten years ago.
Also the new (old) jumper looks so much more refreshing and I think this will reflect the overall outlook at the club. It will be like a completely new fresh start for the players who were zombified during the past few years - ie new coach, and handful of new teamates, new jumper, new enthusiasm. A really good way to rid the cancer of the recent past.
Bring it on !!