IMHO
In the present conflict's we need a capable platform NOW, with time on station and accuracy. For the treasury to tell MOD that Tranche 3 is not possible due to budget, should be combatted by CAS, et al telling Mr Brown that the RAF PLC can't support Army PLC.
As for binning the most capable variant, as I understand it the capability of full A-A and A-G is software implimentation along with trials, testing and training by the OEU/OCU.
Bit then again when have shortages stopped politicians deploying troops?