DSG is a dream in the R as engine really matches up with it well so its so quick and seamless in change and engine response.
DSG is set up correctly for Race, but unless you have a long stretch to push it (as you would expect it holds the gears through rev bands) you might find you will push it into manual (paddles)
Threw key less in more out of curiosity and though could obviously live without it you have to love it also, the button itself is just a
way to start car up.
Rear View camera is my biggest struggle to adapt to, as rarely look at it! Default reaction is still to reverse like always have and still look around over shoulder.
enjoy the collecting 
Thanks. Looking forward to it.
I generally wouldn't go from a car to the same car as I get bored easily but I think the fact its manual to DSG will make it feel like a different car.
I had the reverse camera in my Mk6 that didn't come with sensors so I used it all the time.
So I think I've just got into the habit of using it.
Although it comes into its own when getting in or out of a tight space as I can reverse to an inch or so safely to what's behind me.
Yes, the camera is good for trying to get as close as possible, as you can see the blue of the bumper. But on standard reverse old habits die hard it seems.
Before selecting the R thought maybe should go for another make, and really tried to like the Sportback, BMW and Mercedes but each time they actually pushed me back to the MK 7
Of course there is lots of familiarity with the GTD which loved, but the R fills in all the things you would have liked (not necessarily needed) and so for me its the complete experience now, that removes any feeling of it being the same car.
My wife is not like Rebecca, cars are just cars to her, functional, but you try getting the R off her now?! even she realises she is driving something special.
For example, she came back home the other week describing how she had left some and in her words 'little tw*t' in some souped up 'thing' for dead with biggest smile on face haha, and I was thinking "told you so"
Also originally had the car in 'individual' for her with soundaktor on eco, but when she heard it in race with me behind wheel, she literally demanded that I set the car up for her like that, the R casts it spell on everyone in the end

Think you have a different perspective to offer though as family that will have had all three performance models and will be running a GTI and an R so be interesting to see what you and wife think .. again, happy collecting