Meh, I don't think the problem is lack of levity.
The 'funny' books are worse than the serious ones.
They need consistency. Writers need to be tied to their books for longer periods of time, not that shit where a writer has a book for 4-5 issues and then another one jumps in. They also need more authors with vision and plots that can work within the context of their one book. Not just short-stories and wild crossovers.
Consider Aaron's Thor. It's been good, but now we get this nonsense with Angela suddenly being jammed into the Marvel continuity.