I am a trigger snob. Most of the guns I own have had their triggers worked on by reputable smiths. The only triggers I have tinkered with myself have been on my GLOCK pistols. I prefer smooth over light and reliability above everything else.
The Shadow 2 trigger I tried felt really good and I can't see that much room for improvement ... though there is some. I think the DA is right around 9lbs and the SA is around 3lb 11oz. What interests me about a CGW makeover is the trigger reach reduction and the reset reduction. The pistol would be for the nightstand, carry (winter), classes, and the occasional steel plate match.
I am a big fan of CGW. Every CZ I own is full of their stuff. I have no experience with the Shadow 2, but their upgrades made a big difference in all of mine.