@Meddler: Would Diana qualify as a Champion who could get changes similar to Urgot's previous ones?
Diana, as everyone knows, is in a lousy spot due to having no real role, as well as no ability to recover if she falls behind (which easily happens), all because "tanky AP assassin/fighter" is a toxic Champion design (apparently). But since your team won't remake her until at least mid-2015, why not give her a mini-buff in the interim?
If there's any skill I'd look at, it's Moonsilver Blade. Make it give her more AS based on her level, and it can be more useful. If you have to take away some burst damage, so be it; make her more auto-attack reliant.
Wanna know what I think about Diana? She's trying to compete with Akali on AP dive-assassin, but Akali is better because she's expressly designed for it. Diana isn't, and her attempt to compete with Akali on that front is laughable. Diana should go a different route, something like a magic-damage version of Master Yi.
At least, that's what I'd do.