Its definitely hideous for sure, but you can't argue with those specs. I think the only things that will make me purchase this is if it has a killer camera or killer rf performance but other than that I think I will pass. My n5/m8 combo is working out just fine for me.
I don't know, overall the device will be considerably smaller than the One Max, I honestly don't see them cramming a larger battery into a smaller chassis so my guess would be a 3000mah battery and with how efficient these new chips are I am sure it will have the same if not better battery life than the One Max.