What is really important ?
Is it “good shoe design” with few options or per say it is interchangeable (ITC) shoe?
ITC option. It works for little expensive product …not of regular use.
So when you purchase them, you see the add-on advantage/ value in the product.
Moreover, Interchangeability always affects one of the factors (strength, design, integrity)…to offer it in the product.
Coming back to this post, I think “ITC upper” is a good option but the design should be at par with the existing non ITC design.
Otherwise, it will be difficult to trade with…