I have a bit more time now. I'll try to explain some of the things from my quick post earlier.
Ryu and Akuma will not be able to air tatsu out of corners anymore. Trying to do hurricane kick at or before the peak of the jump arc will pretty much give your opponent a free punish. Air tatsu seems to work the same as long as its down on the downward arc, and still has its crossup properties - I saw Ryu players using it, and Akuma players using it in the vortex. It was hilarious though to see Ryu/Akuma players try to escape the corner...and just kind of float harmlessly in place.
Played with Chun (my main), got a 5-game win streak. She doesn't feel any different. However, against a Ryu player, I did OS sweep against wakeup backdash and nailed him several times. Did not get the dizzy I was expecting. I talked with another Chun player afterwards, and he also mentioned not getting a dizzy he expected off a sweep. So that's just pure conjecture from two Chun mains.
Guile - I was watching a Guile player throw Sonic Boom. I was also looking at his super meter, and I didn't see it moving at all. Now, I don't know how this works fully - maybe he only gets meter on Sonic Boom contact? So maybe saying no meter at all on SB is a bit harsh, but it definitely seems as though it will be a lot harder to build meter just by throwing SB. The guy playing Guile said he felt more or less the same.
Zangief - U2 has way more range now, it was grabbing things I know I've seen it whiff on before. I'll also echo the sentiment that jab SPD seems to have more range. And yes, EX Green Hand does not knock down. In the original loketests for IV, EX GH didn't knock down, and this was a bloody nightmare - if you didn't think to jump away immediately after getting hit by it Gief got free SPD/Ultra. Most non-Gief players were relieved with it started to knock down in later loketests.
Cammy - yes, I know its not actually Tiger Knee motion. Either way, Instant Canon Strike can no longer be done. If she jumps normally it can be done no problem. EX Canon Strike can still be done by QCB, UB+2K. Many people seem to be overlooking the buff that she can combo her normals more easier now.
Seth - J.HP changed, stretchy Dhalsim J.HP is gone. The animation is like a regular uppercut (think shoto or Guile C.HP) but just in the air.
Sakura - Did not personally play her, but reportedly she doesn't feel too different.
Balrog - Did not play him, but fought against him and watched some of his matches. Did not look too different.
Bison - U2 input changed to (charge) B, F, B, F+PPP. More recovery on whiff.
Dudley - As I said before, EX Ducking. Seems to have the same distance and speed as RH Ducking, just recovers WAY faster. If you happen to EX Duck through a fireball, you can pretty much choose what you want to hit your opponent with. Does NOT have armor, was still vulnerable to pokes and counters. Don't know how it could possibly work in combos, had to fight against a Balrog player who wasn't really interested in letting me experiment with stuff. C.Roundhouse is different - maybe a little faster. I did it as an AA, but was not able to follow up, as my opponent didn't fly up as high. J.RH knocks down if the opponent is also airborne, but the knockdown is techable (opponent can quick wake up). Jet upper still seems to have no invincibility frames, still got stuffed.
Gen - reportedly easier to combo his normals, only saw one Gen player and overheard conversation from other people in line.
Yang - Pretty easy to combo into his rekkas. Yang and Yun will probably need to use EX for solid AA. Teleport can cross up. Palm strikes have pretty big hitboxes.
I will echo what has been said, in that there is no way to know how these changes ultimately play out until the final version of the game hits and people get more play time in with the characters. There is no use crying about anything right now. There was also an army of staff and developers watching everything and taking notes, and there were questionnaires for players to fill out.
I was there when it opened at 930, and by 10 there were already tournament level players there, using their mains and fighting seriously. They weren't interested in trying new things out, or letting anyone else try new things out. Imagine making top 8 at EVO, and then going into finals having someone ask you to pick a character you don't regularly use to see how they play. ...Yeah, not going to happen. Also, taking any sort of pics/vids was near impossible.