Trilarion: Yes, very clear point. So combos are not triggered by timed actions anymore. Maybe I just did not understand it, but how will you make combos now? Mixture of left/right click?
Yeah, a mix of that and of combining hexing signs and items. There are actual combos (like fighting combos) which are environmental depending on what's around you. For example, Tomek showed a finisher off at the CDP Days where Geralt attacks and kills two enemies who are both pretty beat up; I don't know what the precise trigger was, but it seemed to be enemy positioning, their health states, and probably a combo of light and heavy hits.
There's also a more tactical element in combat now, where you prep the terrain with hexes and traps, use it to your advantage, and then maneuver to take advantage of the opportunity that you've created. This kind of tactical combat prep only seems necessary on the hardest difficulty; on the lower levels of difficulty Geralt can just wade in and chop everything up like he's making tacos or something.