Sounds like a pretty fair review zigzag,
I read it a few days ago and was going to reply in respect to a few of the negative points you had noted but have only just got around to it now and others have pretty much covered what I was going to say.
Most of your negatives basically sound like you are using too big a kite for the conditions
"over reacts"
"gets overpowered easily"
"I like a kite that depowers when I turn on a wave the Method doesn't do this"
"Under these conditions, the Method pulls the board off its edge"
"The depower line has a tendency to wind itself around the centre line while kiting, meaning that you have to spend a few seconds unravelling it before you can make an on-the-fly adjustment".
All of these issues would be resolved if you were on the 7 in the same conditions.
Maybe they are a bit of a handful when very overpowered but I find that I generally use a kite a couple of metres smaller than everyone else for the conditions and have no problems getting upwind or going as fast as everyone else.
I hardly every touch the depower, I just ride them fully powered almost all of the time and make adjustments for different wind strengths by the way I fly the kite i.e. when turning if overpowered just sheet out a bit and bring the kite around a bit slower/higher than normal.
I will say that I do have a full quiver of Methods 5,7,9 and 12 so always have the right size for conditions.
I love the way that they keep the power on through a turn but if you are overpowered or not used to flying the method I can see how it could shoots across the window and pull you off the board.
"On the Method, the leading edge distorts when sheeting out while flying through the wind window in strong gusts."
With the right size kite pumped up reasonably hard I never have this problem.
Once or twice it has happened and I simply land the kite and pump it up a bit more and it's all good again.
"The kite does not sit flat when sanded on the beach. The centre strut sticks up like a weather vane, and the wind causes the trailing edge to flutter excessively. The Trix is very flat when sanded, and there is hardly any flutter"
I don't spend much time with my kite sitting on the beach but one of the things that I like about the Method compared to a lot of other kites is how well it sits on the beach without any sand on it.
I use a surfboard 95% of the time so if anything I just lay that across the canopy on one side of the centre strut with the fins hanging over the leading edge and find that it doesn't flutter much.
As I said a good review I just wanted to point out that when you get used to the way a kite behaves (e.g. that you can drop to a smaller size) some of the negatives actually become positives.