Two things.
(1) The aircraft change might be reverted since we are still 6 months away. Probably better to check this in a few weeks and not overthink it right now.
(2) This might be outrageous and unacceptable to you, but if the aircraft doesn't change back to one with F, have you considered accepting the downgrade to CW on the same flight and seek compensation for the difference? It would solve all of your collateral problems
