I would go slightly further than KenV's response in that I would remove his "maybe not" bit. Sorry, Ken.
Purely off the top of my head (perhaps through my hat), I cannot think of any case where more thrust would be anything but beneficial to performance, provided it does not mean excessive idle thrust, significantly reduced stall margins or degraded engine robustness.
As airframes evolve, they invariably end up getting heavier and hauling more drag. Furthermore, energy manoeuvrability is a massive factor in weapons range and Pk - sorry for my AD slant there, but it does apply to most air launched weapons.
Must dash, news coming through about attacks in Paris.......