When it comes to barrel wobble, look at the doctor's section and you will find a fix for it.
And if I'm not mistaking the what you refer to as a "CQB sight" and a "Marksman sight"... Aren't they actual "night" and "day" sights? In low light condition, you would be using the one with the big opening and in day light you woudl use the smaller one. Fire using the night sight during the day and you grouping will be shitty (With real steel mind you). But I might be wrong...
Instictive shooting is usualy used for CQB (when no others aiming aid is used).
"Good judgment comes from experience. Experience comes from bad judgment!"