Of course it won't be as bad as it was when FC2 was released... That was a terrible console port. And since then Ubisoft has had a good track record with consoles. Its not really rocket science

just some decent hours of testing id say.
I don't think they will have a performance slider on consoles, period. They're inner workings are already just like PCs and having performance sliders would result in companies like sony releasing consoles from the same gen with different performance. And then the main advantage of consoles over PCs is gone...