I still think it is a bug because the alternative is that ND removed perfectly working hit reaction model of U1 and U2 just to fuck up the encounters in U3
Huh, I totally didn't realise that enemies weren't flinching in UC3. Then again, I started the collection backwards so have UC2 to play next.
That might explain why I found the game so frustrating. The levels are so well designed, particularly in their openness, that it feels so close to being great. But the moment-to-moment combat (especially once you get the sniper/rocket combo or the damned armoured guys) just ruin things through frustration as you're suddenly killed due to little fault of your own. It's weird just how much the game punishes movement. Most fights are better suited to you staying in one piece of cover (especially as you can throw back grenades).
I also remember liking the melee in 3 but man, the O to grab move is a mess when it's mapped to cover/roll as well.