Downpour does a few things right, but the good points are so thoroughly eclipsed by the awful combat that it's not even worth going into them. The combat absolutely ruins the experience. It is, without question, the worst I can remember in any game I've played in my life. It's unmanageable, cumbersome and infuriating in every possible way.
If only the final section didn't depend on it so much (and didn't also simply take away all the health packs and ammo I'd hoarded the entire time for that exact possibility), I might have even finished the game. Absolutely appalling.