I suppose anything in the right hands can be done, possibly by installing a lighter spring? But set triggers are just that, using a Moderate pull to set the set trigger, and heavier to go all the way to firing. The front trigger pull can be adjusted to suit you, right down to a light touch.

I have several rifles that had the rear trigger removed, beats me why. I would say if you are not happy with DSTs the easiest answer is a good after market trigger / a military trigger made adjustable, it's the least expensive way to go.

FWIW --- John