Not an area for which I have much experience.
However, in Edith Mannoni's book on Schneider glass, "amphora" type vases with "wrought iron stands" are illustrated but they are shorter and wider in the shoulder than the one posted here. Also, the metal work appears to be well designed to highlight the vase shape and give a very balanced look to the whole. The queried item seems to me to be quite unbalanced in its tripod setting.
Of the vases in the book that are similar in shape to the one posted, they all (or most) show a large, but well-balanced, low knop either at the top of a stem with foot or a stem fitted into a tripod stand and with the knop sitting just above the centre of the metal fitting. The lack of knop on the posted vase appears out of keeping with those in the book.
So, yes, I would also think it is a "sympathetic repair".