Yep, your calves are where the swelling is at its worst. That would explain why the height is not helping.
And by athlete, I meant like professional sports stuff. No matter how god of care we take of ourselves, we are not 21 any longer and things like pumping out fluids are naturally much harder on our bodies. I was going to ask you about the heat with those, but I always heard Gore-Tex breathed well, but wouldn't know, never owned anything with it.
Drop them boots in a bucket of water, then wear them all day until they dry. That will break them in for your feet in a hurry. Old military trick, and one I've used on my regular (western) boots 
I'll definitely give that a try if the wrap doesn't help this next time out. The boots do get hot inside, but not as bad as one would think. My feet have a bad habit of sweating alot anyway. It has been like that since I was a kid. I guess I'm just going to have to accept that more things are going to start happening now that I'm getting closer to 50

. Six more years to go and more things to probably go bad. At least I'm still kicking pretty good and hard too.

Socks for ski boots are taller. I'm sure you can get a good deal on closeouts.
Two pair of thinner socks would help reduce friction.
Seen 3 rattlesnakes already this year and have had a dozen ticks.
The socks I wore this last time out are socks I wear when riding my dirt bike. They are thick and pretty much come all the way up just under my knee cap. They were actually more comfortable than my shorter socks, but also made the rash/irritation worse.
As far as the snakes go, I haven't seen or heard one the last 5 times I've been out (and I've been looking around boulders and large rocks too just to be safe). I keep my ears and eyes alert though because even though I have the boots it is better not to have them get the chance to take a bite in the first place. If I do find one, it is going to end up getting skinned, tanned and fried up. My daughter already told me if I kill one that she wants the tanned skin for the wall of her room (she always amazes me with the stuff she says when in comes to hunting and animal life).
Fortunatelly for me, I haven't seen any ticks just yet or found any on me. Even the last three Jack Rabbits I harvested didn't have any ticks in their ears or fleas crawling around on them. I was really, really surprised. Usually (at least last rabbits season) when I get cottontails there are fleas in their fur and ticks in their ears. These jacks were tick and flea free though. Better for me when cleaning them.

Just for the sake of elimination, Are you diabetic by any chance? Diabetics can have poor blood circulation in their feet. I had the problem with my western boots, My right foot swelled up until I couldn't wear them. Before I was diagnosed with Diabetes. Now I can wear them without my foot swelling. Don't have a clue why.Tom
I don't believe I am diabetic... at least not yet

. I know my Grandmother on my Father's side was and my Dad is borderline diabetic, so there is always that possibility. Although at my last physical they said other than a touch of high blood pressure I'm in excellent physical health and have a strong heart. I was taking a doctor prescribed low daily dose of Hydroclorithiazide for a while, but when I took it I couldn't go out in the sun. When I was taking it I went to play golf one time when it was hot out and it felt like my heart was trying to pump crude oil through my veins!

I had to down (3) 32 ounce bottles of Gatorade in a matter of 20 minutes just to get my heart pumping back to normal. After than occurance I decided to not take it when I was going to be out doing physical activities in the sun and heat. Unfortunately for me, that is 75% of the time, so now I try to limit certain things I could eat that I know will raise my blood pressure and I take my vitamins and suppliments daily.
If the doctor prescribed mediciation like the Hydroclorithiazide, which is a diaretic and makes your body rid itself of excess fluids, along with your change in diet, that would explain why your foot no longer swells. Did they prescribe anything like that for you at that time?