I've not found the Weber to be lacking or missing anything.
Same here. The Weber may have a more utilitarian look than the Feather or the Pils, but personally I like that look. In the end, though, it's the shave that counts (and, in Transylvania, the count that shaves).
Muhle makes the Edwin jagger razors and the handles to look the same so it's a plastic body with a chrome plating.
The chrome plating on Mühle and Jagger heads clearly has to be applied to some kind of metal. I suppose it's pot metal, but it might be brass. (Does anyone know for sure?)
Question, can the weber handle go on a old type Gillette head?
Yes, both the Classic and the Bulldog handle fit on an Old Type.