I'm on email most of the day today... so when I got the email of your post, I just went here and answered your question.
Yes, EEE's are very wide... and it's a problem finding shoes. When I find them, I usually buy at least two pairs.
You DO have to be careful when stepping on the SoftStep!
Another thing that I've done is be mindful of WHAT I assign to each Quadrant of the button. In other words, I do NOT put a 'STOP ALL' function next to something that I am going to be using a LOT of (say, patch changes). That would be inviting disaster IMHO.
So part of the game is to think about where everything is going to be laid out.
I'm not using all 80 of the trigger functions... but I'm using more than what the standard config would allow for in a standard SoftStep setup.
A friend of mine has the 12 step and I tried it... but believe it or not, the buttons seemed to be harder for me to get to than the SoftStep... at least it seemed that way to me... which is why I went with the SS instead of the 12.
It may be a matter of button 'technique' too. I think I was thinking of the 12 Step as a sort of 'keyboard' and when I think 'keyboards', I don't think about using the side of my foot like I do with the SoftStep. It probably would have worked, but it just didn't feel right to me so I bailed on the 12.
I understand about the PK-7... I'm totally over carrying a bunch of heavy gear - which is why I spent so much time programming and setting up the SoftStep. It's light, pretty much bullet proof, USB, and TINY!I (did I say TINY?)
I also own a FAMC Liquid Foot JR+ that I use with my AXE FX II... and that is GREAT! But it is also HEAVY!!! Which is why for my looping rig, I needed something lighter.
UPDATE:
I've attached a pix of the layout I'm currently using so you can see what I mean to choosing placement wisely.