Isn't it clear? In exchange for 3-4 months taken off of their flow through time, and an additional 3-4 months of captain pay while still flying as a first officer and/or in training, they will have to upgrade to the captain position, something that many protected pilots waited 8 to 10 years for while the industry stagnated. On top of that, they will have direct entry captains below them on the reserve list when they upgrade so they'll never have the opportunity to be the bottom guy as a reserve captain. Absolutely barbaric!