Same here. For things like vacation houses, VRBO has been much better. I feel that there is a lot of high-end inventory there. Plus, house owners are familiar with the site, so they stick with it, even if the experience is not great. There's untapped potential on VRBO.
I've quite literally never had a major problem with AirBnB, and I've used it 20 times over the last 3.5 years. With HomeAway / VRBO, the booking process is a nightmare, and I've had a cancelation with three days notice for a 15 person house booked two months in advance.
What did I do? I found a place on AirBnB and was able to book it no problem. So I have a hard time seeing how the HomeAway / VRBO experience could come even close.