First off where the hell did you hear that you can not attach limbs to limbs. Oh thats right we haven't. Please do not make stuff up.
Second that video confirmed nothing. He got cut off we could not hear most of he was saying. What we DID hear was that symmetry is the default setting.
The no limb branching thing, it's something I could SEE them taking out, but, to date, there is no reason to believe that they have. It's not something that should be touted as, "Oh it's been taken out no doubt." However, I could see them putting that limitation on due to animation issues. I'd keep my expectations for that one low.
The video confirmed two things. One, asymmetry was once possible, and that, to be more "user friendly" it is now fully symmetrical. I have never seen a creature editor video where things were not mirrored on the other side of the body, even back at GDC 2005, but apparently at one point it did not. Since we know that it was at one point possible, linking
this image is pointless.
I'm not saying that asymmetry is 100% confirmed to be removed, I'm just saying that, after watching that video, I wouldn't hold my breath too much. Try not to get your heart set on features that may or may not be there, that's what will lead to disappointment. You can hope that it's there, but if you get yourself to the point where you
expect it, and Maxis does not deliver, then June 17th is going to turn from a day of excitement to disappointment.
I'm not saying that it's been taken out for sure. I'm just saying that, trying to put your own spin on what was said because you want asymmetry to still be possible might not be a good idea. People did the same thing when Will Wright stated, "water creatures are on the cusp of being cut out." Back then, there was one camp of people who insisted, "
Oh, he's just talking about the underwater CIVILIZATIONS. Cities and stuff. I'm sure you'll still be able to make underwater creatures for the creature stage, just not bring them to tribal until you move to land." It's these people that were the most disappointed when they found out how the transition from cell to creature was going to work.
It's just safer to let yourself get excited about features we know are in there, rather than ones that are iffy.