I couldn't stand original GD... i'd listen to 1 or 2 songs at the most.
The production was awful... the recording sounded dirt and too much distorted. The instrumental was annoying (the drums mostly)... it was like every member wasn't playing for the song... they were just showing off.
I'm not any kind of expert in music technicalities, so i enjoyed a lot most of the new songs. They sound clean, they sound modern, they sound refreshing. A little bit generic, yeah... but they gave me the same feelings as if i was hearing new unreleased Chester material.
What i get is it may be worst for old GD fans, because the songs were modified a lot.... its like LP doing de HT remaster and changing the songs to a more "one more light" style.