Hopefully hacking or engineering with melee or stealth will be viable from start to finish to play the game, one scene from demo at the end show potential if done right. i think that the combat encounters are big enough and look like they are also designed around stealth, maybe im wrong. They have chance to make papamole combat the right way finally, Witcher 3 execution wasnt good, fucked up hit boxes, some animations bugs etc... and it didnt have variety. They improved in expansions mostly thanks to better designed boss fights, and more variety in monsters, better AI but the core combat still was flawed. I also like the aesthetic, lighting improvements over Witcher 3, and how the color pallete and lighting changes across the demo, i like the in-door atmosphere. Dialogue system looks interesting gives Alpha Protocol vibes, and its not cutscene, so even CDPR is backing from the "cinematic experience", i don't need many dialogue choices if every choice will have some impact on the outcome of dialogue.
The game is still far away, this is probably the only part of the game polished enough to show, and its small part... I dont know how they will pull off the game. Even these mega-buildings looks like they require tons of work content wise.