I used Thrust Vectoring in the Harrier - and it did make the nose do some amazing things.
Some of them were what I wanted, to get a quick shot off, but the loss of energy was a problem.
Many of them were way different from what I wanted, and a "loss of control"- or something close - was often the sequel..........
Probably due to my incompetence.............
I don't know if MOG or anyone else actually utilised Harrier Thrust Vectoring in '82 in the air-to air environment - I suspect not as it was a relatively benign environment.
I used it over Stanley for different reasons in '82, but it's use did not achieve the end results that we were looking for!!
The charts and graphs on preceding posts probably explain why it often didn't work for me - clearly I spent too much time looking out of the window, and not enough time confirming that I was meeting all the parameters to achieve the correct variables that would have made my life so much better.