I'm OK with the D-pad too. Maybe my thumb is more flexible than others' but I can change stuff on teh D-pad virtually as quickly as I was on the joystick on my 7D. And since my 70D is similar to the 6D, it's all I am used to now.
On the AF note, last night a fiend of my wife's came over and they were working on some stuff in our living room. I grabbed my 6D and Tamron 24-70 2.8 and started shooting using only the outer points at 2.8. Under ceiling light, my hit rate was about 98%, I used both one-shot and AI servo too. Granted they were not running around, but did move around etc. I was happy with the results.
Then I also used my 50 1.4, between 1.4 and 2.0, results were again surprisingly good. Then used my 85 1.8 with the same good results. I always placed the outer point on the eye (mostly I used the top 3 points) and the AF performed well under these incandescent lit indoor conditions.
I planned to switch over to my 70D just to test if it was better, but since the 6D was doing fine, I pretty much forgot 
That of course doesn't mean that these non-cross type points are as good as cross type ones, and I'm sure if conditions had been worse, they would have struggled more, but I thought I'd just share my experience how they work in a normal, real-world indoor situation under decent indoor lights.
Light level yielded photos with settings: f/1.8, 1/200s, ISO 2500




