I'm an old PC gamer and after 6 or 7 years (maybe more, I can't remember) of being on a console I still can't aim with those damn thumb sticks to save my life. I have to use VATS and Easy mode. I can't play any shooter on any setting other than the easiest one on my console. I just can't finesse my thumbs enough to aim with those tiny sticks.
I heavily rely on VATS in Fallout games and without doubt VATS in FO4 is really messed up. Not once have I been in a situation where there is more than one enemy within site and had VATS focus on the one directly in front of me that I had my cross-hair on. It always locks on to the enemy out of site and some times they can be quite a distance away and I have to cycle through targets. That really svcks because time doesn't stop in VATS in FO4, so by the time I cycle through targets and then which body part I want to hit, I'd say 80% of the time the target is blocked by something or someone else, usually a flippin' companion.
VATS needs work, but I don't know if that's possible. It seems to be something that is deeply embedded in the game. But I don't know, I'm not a programmer.