You are assuming a professional negotiator would have clue what circadian flips are. The wouldn't. Or if they knew what those were, they wouldn't understand the importance of separate hotel vans from the cabin crew, or why being able to put all your reserve days in a row is important, or how forcing large amount of vacation out of limited peak months increases vacation in desirable shoulder months.
I've worked with several Scope attorneys, which in the ALPA world are about as close to a professional negotiator as you can get, and while they are great at making sure the language is tight and everything says what the actual intent is, for the most part they are oblivious to the inner workings of how an specific airline operates, even on the scope side. Just like I laugh when people (who aren't Soviet Sub Commanders) say "let's just copy Delta's contract word for word", not having somebody involved who actually lives the day to day (and even more importantly does regular contract defense work between bargaining cycles, is really, really dumb.
ALPA's "chief negotiator" who just retired last year, was a staff attorney with almost 50 years of experience bargaining contracts in the airline and the recording artist industries. He'd be the first to tell you that his job was to guide the process and then get the hell out of the way and allow the pilot negotiators to sort out the details.
Sure your last NC missed protecting against circadian swaps on reserve (and probably a boatload of other things too, just like every NC does), but it's a process, and if you don't have the patience to wait one bargaining cycle to fix those things, and yet are willing to pocket all the things they did fix or improve for you last time around, you're in the wrong career.