Personally, I think Arcardia's logical choice will be VF-1D as not much engineering job to do, at least gain some momentum and get going.
while releasing old mould, they can take theirs time to redesign YF-21, to stay on the game.
1/48 is only beginning while majority collector are stuck with 1/60 and 1/100. as per 1/60 in term of size for those space constraint collector still have some edge for now...
but when 1/48 gain up momentum, Arcadia better offer premium finish as a standard issue instead of asking more, as Bandai will be unstoppable.
in 3 years if Arcadia still think like the pass... good luck.