Jerykk just wrote the examples I wanted to give about the lack of jumping. We can add OFP/ARMA to that mix as well.
R6, GR, OFP etc are military games where jumping would be about as stupid as what these guys are doing to Thief 4.
The design principle of the Thief games has always been about freedom of movement. Heck the same dev managed to still have jumping for DxHR!
What I fear is that they are just taking the "everything has to constantly look cool and nobody has to get stuck anywhere" principle way too far.
Reaching places you're not supposed to reach is a part of the PC mentality if I may say so. It's always about finding a way to do something which is unique to how others have done it.
This completely gues against modern game design. If there was a minefield these guys would draw a big red line through it for the safe path and have a popup warning in case you wanted to stray off it - that's what it's about when they removed jumping. It's just a part of the overall design they are aiming for and none of the people here are the target crowd.