What new features are in 2.0?
OVERHAUL - HLC now uses Xash3D Engine. This will give you a better, more authentic experience.
ADDITION - HLC now uses the WON menu!! (as it runs on Xash3D Engine)
Why was it delayed?
Because of piracy issues. I have an idea, but it may not work. Because the mod folder contains the FULL valve folder, (I copied the valve folder and edited the DLLs) the full game will be in action, hence you won't have to pay.
To prevent piracy, I have come up with a new idea.
Trying to prevent the piracy issue
I've added a password to the ZIP file, so for the password, you'll need to go to your Steam Half-Life files, and go to valve > overviews > boot_camp.txt, and find the 1st line. That will be the password.