Wish people who are complaining about their PC setups, understand that this game is a ported game, that has obviously an engine that's -unoptimized for PC?
Case in point Battlefield works fine for the most part on most PC setups, because the Frost Bite 2 Engine they are using is optimized for PC.
Monolith has become more of a console developer as of late, so it's understandable to see an unoptimized game from them on PC.
Especially when you compare this to other Next gen console games on PC.
The issue I think will be if this continues to become a trend. But I think it's just going to take time to get the kinks worked out of new software for developers so they can have some sort of parity across Console and PC, in terms of just optimization on their engines.
It happened last generation, it took them a while to get their engines somewhat optimized for PC when they ported. We still get crap ports, but most games now I feel run fine on most moderate hardware.
Also who's to say they won't patch this later? Sleeping Dogs I believe had some performance issues on PC when it first came out, they patched later down the line, and it ran smooth as silk.