Yeah, short hopping is a pain. You're looking really good for the most part, though. Can you make it to Genesis 2?
I have a lot of the same habits as you, ha. I haven't watched everything yet and I don't have too much to say on what I have seen since it looks like you figured out a lot of your problems as the games went on, but there are some little things here and there that are good to keep in mind.
For example, the way Tec0 likes to nair your shield is a little risky since he does it early, so if you do the light-shield trick, chances are decent that you could grab him out of it.
Some other little things:
-A lot of the time when you're next to a Fox who missed a tech, you dsmash. Jab reset -> grab/dsmash is generally better, but if you were doing dsmash because you thought your opponent would SDI the jab upwards, then your decision is understandable.
-You don't follow up on attempted bthrow gimps with Sopo very well. Most of the time, it looks like the Fox just immediately double jumps and safely recovers high. You have a couple options to beat the immediate double jump. My overall favorite one is to just blizzard immediately after bthrow (edit #3: I see you did this later on, so I didn't need to tell you this; whoopsies), so that Fox jumps into it and then has to up-B from below the stage. Another option that is good if you only have Popo and have at least as many stocks as your opponent is to run off and short hop nair; if the nair connects, you can follow it up with more aerials for a suicide gimp. (edit #5: had you done this on Swift's second stock after the bthrow around 6:25, you probably would have gotten a solid stock lead).
-There were also a lot of times when you would uthrow a Fox onto a platform and you wouldn't follow it up well. For reasons that I've never bothered to identify, almost all Fox players will always tech in place or roll towards the center after you do this. Something that seems kind of goofy, but works really well at dealing with this is immediately doing full hop fair onto the platform after the uthrow. Depending on percentage and DI, the fair will typically combo into another aerial or a grab/smash.
edit: Oh, if anybody cares, I think some videos of mine from the last 2GG will be up on HMW's channel soon. I feel kind of iffy about how I played, but conveniently that didn't seem to matter much. The results from that tourney are here:
http://www.smashboards.com/showpost.php?p=12888549&postcount=268
edit #2: Aw, you totally had Jman. It looked like you got a little nervous a couple times in the last round, though. It happens to all of us sometimes.
edit #4: Why do you always strike to Battlefield against Fox? I think it's his best neutral against ICs, but maybe that's just me.
probably last edit: This is kind of a boring technicality, but it looks like when doing dthrow -> dair, you use the C-stick for dair. I think the quick motion necessary to get from a jump button to the C-stick is easy to mess up in a high-pressure environment and the simpler motion of *jump button* -> A is easier to be consistent at. Of course, this doesn't necessarily apply to you, but it's helped me.