I agree.
I'd already decided not to get a H520 for a couple of months after it's release to the market anticipating teething issues. Seems that my decision was a good one.
I was one of the first to receive the H480 back at the start of June last year (ordered it on a pre-order). I guess I was lucky with the one I received since I've not had a major issue with it so far that couldn't be sorted out with a firmware update. However, I'm reluctant to tempt fate twice. I will have one, but I'll wait 'til spring next year. Hopefully by then Yuneec will have got all the info they need from their 'guinea pigs' and implemented the fixes.
I think hanging on is what is all about. I'm now thinking of putting a Tarot 10x Camera/Gimbal on my home built Pixhawk 3DR Y6 for inspections and will use the H for more critical picture quality jobs.
Perhaps even get a used 920+?