If it takes tolls to build the East End Bridge, so be it.
I'm still not convinced of the need for a second downtown bridge.
If I'm staying in downtown Louisville for a conference, I take the Clark Memorial Bridge (US 31) if I need to go across the river. If I'm going to Indianapolis or points beyond, I typically take I-75, I-275 and I-74 and bypass Louisville.
So I probably would not be affected by a toll on the Kennedy Bridge or its new sibling.