well, no need for wondering.
iirc, you have read the vass book and you've been intrigued by the skills and knowledge involved in the process of shoemaking, as is my uncle an retired engineer, who never really cared for his shoes, until he joined me on a trip to a shoemaker and my lastmaker.
understood that arch support is not a given thing in rtw or the austro-hungarian approach in bespoke making. afaik, vass builts in a slight support. someone more involved with vass might be chime in here. in my personal experience with custom made footwear, the arch support is finally installed after the breaking in period. normally a month after delivery or in other words after a dozen of wearings.
regarding your request about their ability as walking shoes. i would say: absolutely. the characteristics of a derby, where the lacing can be adjusted a bit better, in combination with the obligatory double sole makes them a good companion on day to day walking surfaces. actually i'm doing a lot with my derbies.
hope this helps
you are evil.
and the last piece of the puzzle is always recrafting, which i can't seen to find an answer and is more important since its hand welted.
how's the experience working w/ vass for recrafting the shoes for people living in the US?