Yeah the game never even hints at any combo system, though to be fair they never explain any mechanics (I guess in pursuit of immersion).

This video is not completely exhaustive, but goes through a fair amount of combos. In general, you can always interrupt a combo after the 1st, 2nd or 3rd attack with the melee button to punch/kick and follow up with a different two-attack combo. The finisher where Senua impales the enemy and pushes off with her foot can also be interrupted and extended by pressing light attack three times (which I don't think the video covers).

I didn't completely hate the find-the-symbol puzzles but they were definitely not particularly interesting. I think moments like the >!blind trial!< were where the game really shone. >!Navigating purely off of sound and controller vibration and avoiding the monsters in the dark!< is an experience that will stay with me for a while.

Completely agreed about the linear structure, I always thought it was the success of Witcher 3 that started an open-world craze, but regardless of where it came from it definitely ended up negatively impacting some games.

In general I think Ninja Theory did an amazing job at hiding the budget constraints. Another great example is the use of superimposed footage of live action instead of attempting to render characters and doing it poorly. The overall length of the game is also a part of this; they didn't attempt to stretch too far and spread too thin but instead just made something brief but with the best quality they could. The game is short, but it didn't feel too short. It felt perfectly measured for the story they were trying to tell.