Can we look at Diana's mana problems?

Some people might call me crazy, but if it weren't for her abysmal mana costs, I think Diana would be a viable jungle pick in the current meta. She has very good clear times and stays relatively healthy compared to other junglers, both of which are much more important than in the previous seasons' jungles. However, she goes oom so quickly that it really makes it hard to justify picking her in comparison to other champions.

Power wise, I think Diana's actually in a good spot. But man, watching my entire mana pool disappear when trying to clear a camp or two really hurts. Especially when compared to champions like Jarvan IV and Vi, whose mana costs are considerably lower, almost across the board, and and they have larger mana pools with higher regen.