I would try to figure out why it is wavy - remove it - fix it - and sew it back on.
Overall, that is a very attractive quilt.
This is at the point where you can change/fix it - if you choose to do so.
I think "trying to quilt something out" to make it better is in the same category as putting on dirty underwear after taking a shower. You may be the only one that knows - but you DO know!
I also think that it puts an unfair expectation on the LAQ - although many of them seem to be able to perform miracles.