First, the name "Amithlon2" does not apply. It's been changed for trademark reasons, and the new name will be announced when the product goes on sale.
Now, to take things one at a time:
What I was wondering is, should I be looking forward to Amithlon 2?
Only you can answer that one.
Does it do anything Winuae doesn't?
Yes, a number of things, mainly centered around hardware access from AmigaOS and the ability to run x86 native code.
Is it any faster?
Yes, it's approximately 30% faster, though YMMV slightly.
It cost a lot more, well Amithlon 1 does anyway.
True. "v2"'s proposed price was much lower, but it won't come with a full OS 3.9 disribution, so you may need to add that to the cost. Either way, the cost will remain higher than Amiga Forever, but that's to be expected.
And no, I don't know
when it will finally be on sale.