If I'm reading this correctly, the shoe does not fit in length, the instep, or the heel, but does fine in the width. Most people take at least 1 size down from their brannock size. I would try an 11 UK next time, or accept that the last doesn't fit your foot if it is too tight in the width.
You seem happy with the 11.5s, so it really is up to you.
The instep is definitely higher than mine(hence tongue pads, but I use this in many shoes because of my collapsed arches). The length is a hair long. Heel shape and width fits fine, except in depth. I only sized up to accommodate my orthotics. Maybe I should go down next time? Truly though, the width is great, especially in comparison to my AE that fit me well.
What does this mean for me when I wear shoes in the Simpson last? They fit well in store when I wore dress socks, had swollen feet, etc.
Edit: I wore them again and the length is NOT too long. It's just because the topline is lower than those in other shoes so it felt like it was coming up because my orthotics lifted up my foot. All my shoes have the same amount of room in the back and I have never noticed anything wrong with those ones in terms of length.
Edited by forbritisheyes - 3/24/15 at 11:44am