Finally got a chance to check out Nighthold Normal. I'm a weekends-only raider, usually a PUG player, and my initial thoughts:
THANK YOU BLIZZARD FOR GETTING NORMAL RAID TUNING RIGHT THIS TIME!
Contrary to what everyone around here says, I think Emerald Nightmare N/H was fine, no comment on Mythic, and I was supremely disappointed with the direction they took with ToV initially. However my initial experience with Nighthold - which was only downing Elisande and Gul'dan so far, mind you - is overwhelmingly positive. The fights are challenging with interesting mechanics without clobberstomping your raid with ridiculous damage output and ridiculous DPS checks. Not to mention the fights themselves were incredibly fun!
No comment on Heroic. I am just beaming with joy that Blizzard finally hit the Normal tuning nail on the head in a follow up raid. Highmaul was great, Blackrock Foundry was a failure (causing me to quit WoD for the rest of the expansion as a direct result); Emerald Nightmare was great, ToV was a failure (initially), but Nighthold is great again.