Power v Drag
Lift v Weight
Designed as a trainer and stretched (capability wise) into a combat aircraft. However, with the Jag in its current guise, you get a lot of bang for your buck and the Design Authority implications are much simpler to deal with.
Mind you, they’ve put so much new kit in the cockpit, I’m surprised you can see out of the front these days.
Like most jets, started off with limited capability and by the time it came to the end of its life it was/is quite good at what it does.
MOG