Why would you want more accurate weapons? As long as you use cover and move around the close combat, hell even mid-ranged combat was a breeze. Only using the sniper rifles with the range finders was a bit tricky at times.
I thoroughly enjoyed the early stages of the game. The difficulty of taking out half a dozen targets with that crappy little pistol. Even after picking up a sawed-off shotgun it was still a nice challenge. Then you get your first silenced pistol and it becomes a hardcore stealthy shooter, if you want it to be.
Once you got the better weapons it was far too easy. The Gause (or whatever it was called) gun that shot railroad spikes was pretty much an instant kill weapon. Good thing they saved it until late in the game and gave limited ammo.
Even the special weapons like the faster firing AKs made the game a bit too easy. At least for me...
As far as Clear Sky goes I am a bit worried now myself. Because they made a lot of improvements to the inventory and bartering system. How could this one not be as good? I better dig up those reviews.
Edit: About the Stalker mods... I tried a couple mods early on that stopped the weapons/armor from degrading and that was kind of nice. But I never reinstalled them after I built my new system and reinstalled the game. I must have played the first half of the game at least a half dozen times before making it near the end-game. And I hear there are three separate endings?