Before slagging off the American planes too much, you should note that the next generation F-35 Lightning will have optional Rolls Royce engines and battle systems by BAe (as does the F-22).
The critical point of the original post is summed up by the following:
What a joy it is to think that we paid £119m to upgrade the Tranche 1 planes back in 2008 so that they could do ground attack. In 2016 the RAF will finally have the pilots it needs to use this capability: but by then the Tranche 1s will already be being thrown away – all of them will be gone by 2019, remember.
We paid all that money upgrading the Tranche 1s and now we'll dispose of them without ever having pilots trained to use the upgrade!
So, I'm concerned that while it may not be an inferior plane, the tardy delivery, the perceived need to alter them and their "imminent" disposal, leads me to question whether they were the best option for the RAF when the decision was taken. :-/