I had that problem of vibration. So I searched solutions of the forum, I found someone talking about prop balance... Humm interesting... I did that and.... hoooo yeah no more vibration.
I am photographer. I bought the H because I thought it was a "ready to fly" bird. Now I have understood and accepted it is not really a RTF... Some ajustments, settings,experiments, must be done and now I am quite happy.
Remember the first canon 7D' a super camera, but thé factory settings were awful and after my first shooting, I was about to send it back. For me the H, is a Canon 7D !
But I don't forget that Yuneec has a big job to do in order to correct and improve that bird