From what’s posted on OMAAT the proposed enhancements are mostly fluff that I would not pay a dime (well ok maybe a dime but not $300-600).

for example if I’m flying Polaris I don’t need to board with GS there is always more than enough overhead space. I don’t need a mattress or PJs (I take them for Mrs B but would never actually wear them on a plane) etc.

the only appealing options were (1) skip the line at Polaris dining room and (2) a more edible pre-order meal on board. But neither is worth $300 and if I’m following the CIA jet lag diet I’m probably not eating at all.

the old F seats were wonderful and I would consider a premium for that but that’s about it