Q6 was a temp name, like X6 based on battery size.
For now the working title is Q8 and the smaller Q4/Q5 is not under development now, first the Q8 
Yes Tom E is making a list of components and the 85 will be on the first version.
But understand that for small buyers the difference between for example $0.30 and $0,90 might seem small and a no brainer, for larger orders the difference can even grow if the 0.30 item is given at a price reduction while the 0.90 could stay the same because of it being less widely used.
Then multiply that difference by a lot of individual items and things are not as close as we might expect.
I started a topic yesterday: please if anybody know where to find a budget fashlight using the AT85 drop some pointers there: Budget flashlight with Attiny85 and electronic switch