I don't think the PC version is a poor console port...? It seems fine to me. I'm not having mouse problems... Everything seems pretty accurate to me. I predownloaded it over the weekend and it decryped in about 2 minutes. I'm getting good FPS, and performance seems great (although on my computer - Core i7 2600K@4.4GHz, 16GB RAM, Radeon 6850, 300GB SDD - it should).
My only real problem with it is the really long load times... I'm playing in the hardest mode (not sure if this was wise or not) and I kept dying until I took the combat tutorial... that helped a lot. Once I learned the whole "cover" thing, the game became fun... and I haven't died as much. But when I do die it's like 10-15 seconds to reload... I have an SSD and the game is on the SSD, but I think the load delays are because the save files are being put into my \user\ area which I have mapped to a larger HD. Since I'm used to SSD's at work, and normally at home, this whole waiting thing is foreign to me.
But the game is good - suitably hard... which I like - and the graphics and gameplay are good. The cutscenes are long and frequent, but the story is vaguely interesting so that's ok. I like it.