Ok, here is the thing about QOL pertaining to Spirit. Remember, I used to work there so understand how that system works vs. a PBS system. Compared to Spirit's current contract to what I work under now a PBS system, I HIGHLY prefer PBS.
PBS allows me to bid weekends off and bid to get the days off I need off during the week. Under the Spirit line system it was hard to get all the days off I needed and wanted and then hope I could drop the days. Why that occasionally happens now, it happens much less often as PBS offers more options under the solution to get those days off.
The way the NMB is looking at this, every airline out there of Spirit's size has PBS so with the pay raises, LTD, DC the company offered, the NMB wasn't going to entertain the Pilot's wish if they didn't want PBS.
Finally, I read the PBS LOA. It is exceptionally written as it is favorable to the pilots and protects them. So I am not sure if this really is a hit on QOL as some are saying on here and airlinepilotcentral.