I'm not sure why anyone would have an issue with having TrueCommerce as the VAN. I've always touted that as an advantage. This week I presented a client with 3 options, because they thought they should. I told them that True Commerce was the Endorsed Solution and explained what that meant, gave them the B2BGateway cloud solution which is a much smaller investment, and Mapadoc which is what it is. All I did was present the facts and the relative costs.
They are probably going with TrueCommerce, because they believe that an Endorsed Solution is a better bet, even though it is a higher investment. I really have nothing to say, because that was the only negative I could identify.