'Proone' - 'downsizer;' has it right.
12 Sqn is not frontline4, it is involved in training the Qatari crews Bit of a comedown for Shiny Twelve, but maybe later it will return.
9 Sqn acts as an aggressor unit - yes it could return to an operational role fairly quickly if required, but that is not where it concentrates its work.
I do recall there being pictures of the Arrows with Sidewinders and gun pods on their machines long ago, but let's not push the boundaries of absurd. Again, things COULD be done if necessary, but that would take time, money and equipment pre- prepared.