IF the skin is as delicate as implied in the one description(like a pinkie's skin) then they would not be able to be bred. But according the the other, the skin is quite tough, and hasn't been an issue.
It's not the same to say that it's like a human without skin. The beardie HAS skin, has the same type of skin, just not as formed, so it didn't form the scales.
IF the skin is tough enough to withstand breeding without injury(or without more injury than normal breeding like happens with normal scaled beardies) then I don't particularly see the issue.
IF the skin is prone to being torn up and is easily injured, then there is your physical issue.
Allessandro said that the skin isn't an issue. The dragon doesn't need special handling to preserve the skin. If the silkback's skin can withstand NORMAL wear and tear, then it should be fine, if weird looking. AS LONG AS no other complications arise later on.
It's the same as other morphs though. There could be other genetic problems later on, but you won't know if they are perfect except for no scales until they've been bred.
They are still no more of a mutant than a pastel ball python.
I'd like to see more information about how tough that skin is. If it's really delicate and prone to injury, then I'd say that's not good at all for a beardie. If it LOOKS delicate, but is actually pretty tough, then I wouldn't have issue with it.
What exactly is it that you think the silkback CAN'T do that a normal beardie can? Other than breeding, I think everything else was covered in the information early on. They eat, they bask, they run around. They don't break open by brushing up against things accoding to the OP.
Perhaps the description on the other website(pinkie skin) is the misleading bit? Maybe they should have said skin that LOOKS like a pinkie mouse's? Because the OP says different and they are the originater.
Saying that we shouldn't trust the OP is rather silly, since the OP and ONE OTHER PERSON are the only holders of the silkback at this point. Since you don't trust the other holder, you are reduced to ONE person who owns and holds the silkback. Why should we listen to people who've never held one? The only information that I would consider crediable is information from people with direct experiance.
If there is OTHER sources of information on the silkback, then I'd love to see it. So far there's two people with them that have come forward. Both of them own some.