Please hijack away. I'm sure people will love to see your set up.
I haven't toured with the Specialized yet, Covid got in the way, and so have just one cage installed...the Diverge can take three. This is half way through a 60 mile shake down loop I do from my house, it was cold and there are lots of places to stop for refreshments on the route so a single small bottle was all I took. On tour I have at least two one liter bottles in the cages. I've always used the traditionally mounted Carradice and I don't notice if my legs touch the bag. One good thing about going to the Nelson is now I have lots of clearance between the wheel and the bag, with the Camper it was always close.
I like the look of your bike and gear = nice clean look - uncluttered.
I too have used a threadless stem on a seatpost to move a bag further back. In my case it was a large handelbar bag that had a fair bit of weighting it. The setup I used meant that the handlebar bag didn't affect the steering.
Cheers