Is it too much to ask to wait until we get the actual machines in our hands and use them for 30 days before deciding our verdict? Maybe they suck. Maybe they don't.
You don't need a "hands on" nor 30 days to realize 16gb of RAM isn't going to be enough for the CAPEX of a $2500 to $4000 dollar machine over the span of (hopefully) 3+ years. That is just one example... there are many more.
(I'm still running 10.11, hope 10.12 is still stable)