As someone who shoots 2312 X7's indoors, I assure you 2016 is not thick
Anyway, I haven't tried the carbon one, but I've only ever heard good things about it. A couple of things to bear in mind though. Firstly, check with the club you shoot at to ensure they are ok with full carbon arrows being used. Particularly outdoors, some clubs don't allow them to be shot as they can be difficult to find. Secondly, as you increase draw weight, the spine of the arrow will increase, so I (personally) wouldn't plough too much into arrows until you've settled at a draw weight you are comfortable with.
As for pin nocks, I use them on my Navigators, and they've already saved at least two shafts from destruction. The actual pin can be a little fiddly to install due to it's size, but I've found the nocks are as secure on the back as with pop nocks in terms of not coming loose/rotating. Given a choice between pin and non-pin nocks, I'd go with pin, even if it were a little more expensive.
Finally, if you do go carbon, if you haven't already, get an arrow puller. Yes, it's an obnoxiously low chance of a carbon arrow splintering while being pulled, but I'd rather spend ?5 on an arrow puller (which also makes pulling arrows easier) than meet that obnoxiously low chance.