Don't worry that I'm not looking beyond Frame X,Y
I really like the sliding vertical dropouts, I've been waiting for someone to do that for a long time.
And I like the 2.5 - looks like a fearsome contender at that pricepoint. I won't have to live in fear of the LBS calling and asking me to come in (as a consultant fitter) to set up a D6 (ranks alongside the Look 695 for groan inducement).
For someone wanting a nice tri bike in the entry pricepoint I'd have fewer qualms about using aeropocket spacers to get the stack up. But unless you can show data that putting the stem above the TT has no deleterious effect I'm not going to view the spacers as a viable option for my speed oriented clients.
Likewise the idea of flipping the provided stem - no one is going to think that a tri bike with a +17Deg stem is a superbike.

As a first run through on comparing the 'fit cloud' I've made some assumptions based on what I can see.
Pad offset 40mm (rear of pad behind bar centre)
Pad stack min 30mm
Pad stack increment 5mm up to 40mm total
Stem lengths 80-90, angles -8 or -17
Headset cover 8mm
Steerer clamp height 40mm
I would be keen to get accurate data from you to do this properly and revise the graph below.

Pad X,Y measured to rear of pad
Comparing Norcom Straight with each stem length and spacer increment on every size (the unlikelihood of a 130mm stem on a small notwithstanding)
to the P5 with the Aduro bar.



Cervelo tell us that the different bar configs are very close aerodynamically, so there is no limitation on using what suits for a client who is looking for speed. Similarly, the under stem spacers mimic the shape of the stem and there is no fear of popping out of a shrouded area as the stem is always higher than the frame. So the fit cloud shown gives the position options while maintaining superbike setup. Obviously using other bars opens up a whole new range of positions.

The intersection of the blue lines is my personal Pad X,Y - I'm a little shorter than Matt Reed (and a lot heavier) running 20cm of saddle-pads drop in a UCI position. From what I can see I would not be able to ride the ML with the stock bars. Or any size in a superbike configuration.
I'm willing to be corrected and will amend the graph as soon as the data is available. Both component coordinates and data showing that aeropocket spacers or stem flipping will not induce an aero penalty.
But at this point it looks like you would have saved money and increased utility with 3 stem sizes and a better pad cup design.