[b] "That thing doesn't obey the laws of physics at all!"[/b] - is what any titan would like to hear whenever they use the thing.
It would be really cool if instead of titans having to apply their (limited) knowledge of geometry any time they want to cosplay Captain America (and level designers saying no by placing a small rock at the place of impact), the shield just did all the work finding targets, bouncing between them and promptly returning in time to for a cool looking catch.
Let rule of cool come first, maybe worry about balancing later.
P.S. This will probably have no effect whatsoever but I'd at least like to see some opinions.