cowgirl is very very intimate with us...

I love the Mish Position. I Love looking into her Eyes as I finish. She has a big smile on her Face.

... is about as intimate as you can get with a woman... don't you think?  Does it really matter what the approach vector is?

But if missionary is too much for you, there's lot of other great options!

Sexual positions and intimacy are two completely different things.  
 
How can this possibly be news to anyone

Unless you are just there to get your nut, for that you could save time and money and DIY with YouPorn.  If your purpose in seeing a provider is to simulate an encounter with a girl friend but with NSA, how can you get too intimate?  If you want a PSE, you still want the connection, only with acrobatics and more acting.

Intimacy and positions, intimacy and arousal...

all are different things.

If I assume you mean arousal:

Physically, some variations of mish make men finish faster because they require more muscular exertion and tension; tension speeds climax, relaxation prolongs it (generally speaking); in particular, tension in the abdomen, thighs, buttocks, pelvis and PC muscles. More full-body contact (compared to maybe CG?) can increase physical stimulation as well, heightening arousal and speeding climax.  

Kegels and reverse kegels can help, as can a focus on relaxation or more relaxed variations of mish.  

Maybe save mish for a very intimate finish

If it's one of my regulars, she's got her legs behind her head and her stilettos crossed, her pussy is wide open while I pound her and she can't take her eyes off my cock as it goes in and out.  Every once in a while she might look up at me and say, "Fuck, that's hot!  Pound me! Fucking pound me!"
And I always do what I'm told.
Pretty romantic, huh?

I don't view sex as something intimate to begin with, more of a fun exercise/stress reliever imo.  Unlike some shared moments before and after...but that's probably just emo in me talking.

cowgirl an extremely intimate position - when she's hunched over and our faces are pressed up against each other, and I feel her breath on me, and her hair is draping around me blocking out the rest of the world...