STALKER 2 needs to be a substantial update, with a new engine and completely new environments. I completed SOC and CS, but didn't have as much interest in COP - it just seemed less engaging. The biggest problem is that the maps may be huge but there is very little to do, where the sewers, bases and boats provide more entertainment.
I still want to support the developer, so unless the DRM is really tedious I'll probably still grab it.
"The price of freedom is eternal vigilance."