I've used Wolff springs in Rugers for years, with no issues. IF you do have misfire problems, simply put the Ruger hammer spring back in.
You MAY experience misfires with CCI/Speer ammunition, or reloads loaded with CCI/Speer primers, as I find them to be VERY hard. I use Federal or Winchester primers. The only CCI/Speer ammo I use is the 45ACP 230 grain flying ashtray.
Unless you are an expert at action jobs, do not mess with the trigger or sear. A small screw up by a novice can cost 3X what an professional action job will.
Anyway, springs are what make the pull heavy. The rough part is simply the finish on the parts. The fit on the parts is where you get take up, creep, over travel, and other problems. Springs will make it light, they won't make it crisp or smooth.
Be aware that we are of course speaking of firearms, and anything you "take" from this post you do so at your own risk. I advise all novice gun owners and aspiring gunsmiths to seek professional help.
Around here, a decent gunsmith will do the springs for you for about $50 including the springs.