Hello,
I don’t find it bad, you just have to find an architect who implements it exactly like that for you. Most architects explain that it won’t work like that, but I think the only important thing is that the load-bearing walls are aligned. Otherwise, construction costs get expensive. Also, I wonder why you don’t work with a T 11 brick and save yourself the whole thing with the WVDS. With the application of insulation, you can never drill into the facade or only fix your outdoor lamp etc. with special screws and dowels. Also, with T 11 and triple glazing including your air-water heat pump or geothermal energy combined with (from $m²) solar, you also reach Kfw 70 - and that is subsidized. Is a shed roof allowed with you???? Here you get real problems with that. In most municipalities, the so-called "quiet roof landscape" is prescribed. Exceptions for this hardly exist - actually almost never. Oh yes - a central ventilation system is okay for houses with max. 6 x 12 meters, otherwise a decentralized one would be better. With today’s construction methods, ventilation is quite important if you don’t want to get mold over the years. As soon as you leave the house alone for a longer time, it can happen without a ventilation system.
Regards Pierre86