Personnaly, I don't like the proportions of the pont de St Nazaire, it doesn't look very efficient to me, I might be wrong as I've never designed something spanning more than 50m!
But, certainly for me, that lack elegance as you describe it, gives a kind of
foreboding quality as you approach, especially when you know you're just about to cross it by bike. I was lucky, the weather was kind and it was early Saturday morning, but even with those conditions I found it very challenging, particularly with the cycle lane being very narrow.
Here's another view:
eck: The Tour crossed in 2011