As said before, I would check the turn to control the pot as V range will crush our hand

pretty much what frosty said

if we flat pre and it comes qxx or axx and villain fires 3 how happy are you really? When you 3bet AQ IP you're looking for folds/calls OOP. By and large, people generally do not 4-bet bluff enough from MP so I'm not too worried about getting 4-bet bluff off the best hand and if I feel someone is starting to adjust, I'll re-adjust.

if you 3bet the button a lot you can definitely 3bet AQo also as a merge.

as played river is a fold and villain is an idiot for whatever he has

People get too hung up on this "will he call with worse" mantra.

Most of our money comes from being in position with initiaitve in the hand.

Yes, at this stage we dont know enough about villian to know if he calls with worse so we dont really know whether we are 3betting for value/bluff at the moment but what does it matter? knowing the correct terminology for a play doesnt make it more +EV