As a very frequent flier, I want more power tools, not prettier interfaces. When I had the status on Delta, I ended up booking most of my tickets through the Diamond Desk simply because they had tools that let us much more efficiently search the itineraries I was interested in. For any given trip, there are often many thousands of ways to fly it, with very complex trade-offs between the options. Once you get to multi-city trips with things like open jaws and stopovers, all hope is pretty much lost if you're trying to do it without working with the airline.

What I really want is a text query interface to QPX without needing to be an airline and pay seven figures for it. (That's not hiding somewhere in the Matrix interface, is it?) Especially if I could cross-reference it with flightaware's revenue and load data, which is super useful for things like predicting upgrades. Kayak's nice, but it still takes hours to go through all the options, flipping between the tabs. I don't really get Hipmunk.

TL;DR: Flight search is extremely complicated and these screen shots don't cover any of the things I find difficult.