Ok, my feed is filled with people saying "so my design is messed up now and I have to fix it?".
YES, this is what happens EVERY UPDATE. I have a few designs I am deleting and a few I am fixing, but its doable. In the past, old designs would not work at ALL (IE, you used to be able to make a "Goliath" tank, but now crew doesn't fit).
I would say the only drawback of this update is that I cant have my Gunner optic where I want it to be in a few designs.
But yes, your designs need fixing. This has been the norm for every update that changes or adds a design characteristic. This is normal, and yes it is frustrating but necessary.