This is meant to be about design quality, not a debate about which style is the most 'beautiful'. There's space for traditional and contemporary architecture, as long as the new buildings and places are of high-quality design and with the necessary supporting infrastructure.
The bridge in unnecessary given that Chelsea Bridge and Vauxhall Bridge are less than a mile apart. there other stretches of the river where bridges are needed much more than this one.
This is a developer led vanity project to boost the values of all the new, expensive flats being built at Nine Elms, none of which are affordable by local working people.