Swedrami: Care to elaborate on each of those alleged deviations?
Sure.
1. completely rewriting existing characters
Character traits, dialogues and roles of Ratford and Drax. You can run the original Gothic 1, talk to them and compare to the remake gameplay video.
2. neglecting established guilds' attitude
Why would Diego care ( or even know ) about their problems? And actually send us to help them?
3. messing up with well-known story
There is a similar questionable death of an NPC in the original game ( Old Camp guard Nek ). They could expand that quest instead.
4. turning Gothic 1 upside down
Those are only examples based on the video. I am pretty sure, the whole game is messed up in similar fashion.
Swedrami: remake done right
In a true Gothic game you can rest in any bed, any time you want. In the remake you should complete a long quest arc to be allowed to sit by a fire. ;D
Swedrami: as in limited to a complete overhaul in the visual department while leaving everything else untouched resp. expand on selected aspects in a way that make sense and stays coherent with the original
Based on the available facts ( like this and previous videos ), it is exactly the opposite. The remake mimics Gothic visual style to some extent, but the game itself is very different from the original.