I just ordered one without it, didn't even factor into the equation. Neither did Sat Nav or Leather! At the end of the day it's all relative, and all about personal choice and what matters most to you. Like this new one, I bought my original GTI purely on looks and what my heart wanted. It's got performance when I need it or want a bit of fun, but most of the time I just drive very conservatively and enjoy the experience.
Statistics are all well and good. So it goes around the Nurb 13 seconds faster than stock. How many laps was that averaged over? Have they released the actual lap times? Just like the performance figures themselves that's negligible in percentage terms when you consider the length of the course! I get that it's more about just the numbers, and the LSD and brakes have their benefits. If you want the bragging rights, and have the driving skills to utilise and appreciate the extra features, go for it