I don't know what you fly, Chinecap, but whatever it is, it's a given that the Jag that you snipe at has a better JRP integration than your jet, a better TIALD capability, and I can be pretty sure that unlike the Jagmates you won't have EFRCs and ETAPs in your cockpit.
And if you're a Harrier mate, they have a better strafe capability than you have, they have an HMS and a higher off boresight defensive AAM capability, they are somewhat quicker at low level, and they could teach you something about serviceability, logistics footprint, rapid deployment capability, etc. etc.
GR.Mk 4 mates can pick some of the same 'missing items' from the list.
OK, they do struggle, hot and high, and the payload is tiny, but these jets have proved their operational utility and worth over the Balkans and on Northern Watch.
These jets were non-combatant only because giving them something obviously useful to do would have served to highlight and underline what a useful asset they still are - quite apart from being a bloody good way of keeping some of the RAF's finest current in a demanding cockpit and a useful role until the Typhoon austere air to ground capability comes along.