Is this the same group of people he brought up on the recent episode of The Talk Show? The group that wanted to essentially take away the original credits (or something to that effect) from him?
Reducing user confusion is one possible answer, but I expect if you are going to argue that, you end up with the name not mattering because most of the users aren't even aware of it.
My point is that there are tens of millions of redditors that aren't. I would also guess most light users of Stack Exchange sites are not very aware of the name.
For all those people, I don't think the name matters. Also, the heavier, more interested users will likely not be disrupted much by a different name.