Something to think about with LBP for back half of the seniority list.
I personally have camped out on heavy international for the past 6 years although I could hold narrowbody captain. I plan to stay at least 3 or 4 more years until I can upgrade to 737 or 767 captain.
The difference in money to upgrade to narrowbody captain today is not significant and my QOL is better as a heavy international f/o.
If we go to LBP, senior f/o's will make less and junior captains will make more. That will be enough motivation for me to upgrade. I will make more but take a personal hit to QOL. Pilots junior to me will be delayed from upgrading to captain, because I'll be taking the seat before I would have under the current system.
The unintended consequence may be less choice.