the Hetzer looks like it stumbled out of the tail-end of WW1 to me. it's more or less a small teepee of armor covering a set of treads and a very big gun. i can very much see this as something the accountants made the engineers rush through as fast as possible, skimping on a number of streamlining processes that might have made it more effective because they wanted it ready for sales yesterday.
that said, it's not too bad to look at in a spartanly utilitarian way. it's simple, it's lines are clean enough, and it has the merits of a big gun. it may not be pretty, but at least it's not stupid looking.