As a professional welder, I like the idea BUT welding changes the metal. It will be harder in some areas and softer in others.
With that said, dependent on what you weld could effect the torsional twist all control arms face going up and down and shifting body roll. It’s why those expensive control area are expensive. The tubing and gussets are far superior to the factory arms flexing in the case of a road course. Or hard Sunday driving. Sadly most people welds are not up to The welding needed to accomplish your fix. Will this work- absolutely. Will it last?…. I’ve seen a lot of welds in my 54 years and most I would not walk on 1 ft above the ground let alone 50ft up. (inside saying with most professional welders. Would you trust somebody’s welds 50ft off the ground to walk on.)
Syleng1