Inertia mostly. I have adapted to our current system. These over max pickups are how common? I did it once when I swapped a 2 day for a 4 day but it gave me 2 days off I needed. I probably could have dropped and then hoped for something to come available but I put a swap in to be sure I didn’t lose pay.
Again, I don’t think over max pickups are not common enough to address. VBs on the other hand are new and are easily put down. The data on VBs will come regardless of my objections. My fear is it will morph over time into something nobody wants or intended.