Well that's the wonder of differing opinions.
Being that I generally hate using my iPad stuck on ios9, I would go back to ios6 a million times over if I could. No new features are worth an overall miserable experience in my mind. If features over experience was my goal I'd probably get android!
Also after having tried a fresh install to see how it would help things, the process of getting the iPad to coordinate messaging with the iPhone involved about 20 minutes of confirmations and verifications and digging through settings. Seemed even worse than when I first tried it on ios8.