My 2 cents from replacing the front radiator support, surprisingly it is actually a highly structural piece of kit. I bought a car with the front of one bent in, like you're described. I removed the spot welds and ripped the old one out, the worst part while it was out is that the whole front of the car can and will flop around. Putting pressure up on one side would twist the whole front out of place.
To me, this means if you've reduced the structural integrity of that piece, you've weakened the front end a fair bit.
I've also got another R33 with JUST the radiator support cut out between the head lights and it retains a LOT more integrity as the metal behind the headlights is still in place. So really it depends on exactly where and how bad the bend is as to what I'd do personally.