I'll just toss this out there for consideration. I tour wearing Shimano sandals because I can open then up, width wise, to eliminate the issues I have with regular road and mtb Sidi Mega shoes.
I use clip-less pedals with the sandals but you don't have to. They make a good solid platform for pedaling. I rode some 2,000 miles touring May-June without any issues with sandals. This month I have ridden 600 miles so far on my road bike using Sidi Mega road shoes and now dealing with some serious feet ulcers.

It may look dorky to ride a CF road bike with sandals but is a distinct possibility now for me.

BTW I do use the Specialized foot beds in the Sidi's that I got from a bike fitting.