VCG does a deeper dive into the changes that GameSpot talked about in their video. They interview Lead Quest Designer Pawel Sasko as he talks about all the changes. Here is a snip;
According to creative director Pawel Sasko, virtually no system of the original game has been left untouched. The designer told VGC that, before he departs for a new adventure in the USA establishing the team who will one day create a sequel, he’s determined to leave the original game – famously criticised at launch – in the best shape he can.
“All the core, main systems of the game have been redone or updated in a major way,” he told VGC. “The biggest ones are the perks and skill trees, which have been rebuilt completely, and the next one is we’ve added vehicle combat which enables new car chases.
“We’ve also greatly expanded AI and completely redone the police system, which is rebuilt from the ground up and now has multiple levels with multiple archetypes of enemies who will chase you – it’s also different in Dog Town compared to Night City.