I would consider a VF-4 comparable or better than a VF-1 Super or Strike in terms of speed and acceleration, maybe range as well, if we knew the fuel figure, but certainly not in terms of weapons, at least unless extra ordnance is carried. 12 medium range semi-conformal missiles is certainly a fairly limited loadout, compared to a fully loaded Strike or Super VF-1 with full external loadout.
But I agree, that the VF-4 was likely well suited to the Megaroad colony missions, which would be spending long times in space and likely lacked the manufacturing facilities and space that the later New Macross class fleets had.
I imagine the bulk of the 8000+ VF-4 produced went to the Megaroad colony missions and were likely in service for so long as the Megaroad colony fleets probably lacked the factory facilities to construct large quantities of newer more advanced VFs. So basically it was a case of the Megaroad ships being stuck with the VF-4.
If 8,245 VF-4 were produced and there were 30 Megaroad colony ships, that gives us a figure of 274 VF-4 per ship. Not many really.
Did Chronicle ever give a figure for the number of VFs per Megaroad?
Graham