Alignment specifically tow out can cause twitchy steering especially at highway speed.
Then the variable assists steering solenoid has likely failed. You should pull codes from ESP and front SAM.That's for sure, though, it is is not the case in this 2008 car. Alignment is with in specs, and fairly fresh. The best way I can describe it - 2008 is "over assisted", steering is too light and not enough visceral feed back.
So consensus there is no way dial back the sensitivity via any electronic connections/star/modules?