On all my triad folders I give them plenty of time to see if they will break in smooth. If they are gritty and hard to open after the high parts are worn on the tang-lockbar interface, then I know it won't get better. A metal-metal interface will gall (transfer metal back and forth and form a rough surface) if the pressure is too high for the hardness. If it galls, lubrication only helps briefly. Even dissasembly and polishing won't fix it, it will just gall again. This is not rocket science, it's well known. In old slip joints you would let the metal wear until the pressure dropped and it got smooth. Not an option here. As for fatiqueing the spring by leaving it open, that's only in your imagination. CS springs are not junky enough for this to work.
If you can't accept a gritty action, the only option is to thin the spring. Most are 0.040" thick. To reduce force by 1/3, thin by 13% or to 0.035" with a dremel. Do it slowly so you don't overheat. If it doesn't discolor you're good. Reblue the spring with some gun store blue in a bottle so it won't rust in there.
By the way, due to the angle of the locking notches in a Triad lock, lockbar spring pressure doesn't make the lock stronger. It self locks. Read the patent description. This is not true for an ordinary backlock.
I've noticed the big folders never cause a problem. It's the 3.5" and 4" folders which have springs too stiff.
This problem reminds me of the fiberglass-in-sheaths problem. No reason for them, a little care would fix it. I would bet money Cold Steel doesn't have a single employee with an engineering degree. This is always a problem with small companies. Unfortunately, I don't see GSMO helping. They're just financial engineers.