If the Ergos stay in that position while in the drops it will be an impossibility to reach up with the thumb and bang down shifts while hammering. That's why I'm a Campy guy. You cannot do that trick with Shimano mechanical.
That being said...Nice Bike!!!! Really.I just ordered the same thing without the extra holes for electronic, as I am a mechanical guy until it all goes wireless with more advances in battery technology... read less weight!
The issue with setting up this frame is the color scheme. Anytime you put black against it (gloss or matte) it turns up or down the Chroma (saturation) If you don't believe this, look at the identical paint scheme with a white headset cap compared to your black one. White "flashes" the blue in the frame and is the reason we like to see the fade from blue to white in it! Compare your original black stem and bars to an all white configuration to see this difference.
The frame wants white appointments with flashes of red jewels here and there on the skewer caps. Nothing wrong with the all white seatpost and seat for a clean look. Think that is a no brainer, although people like the utility of black because you don't have to clean it all the time!
Heck, as unrealistic as it is, I would do white hoods too while you are at it for a photo shoot, especially with the matte carbon levers. Very tastefully done.
Lightweights were great too...as are the Boras or Corima Aero+ MCC's. Bike needs the 45mm depth on the wheels to smooth out the barrage of color; which you nailed right out of the gate to give ya the aero edge.
Hey, you've helped me out greatly by putting this altogether online. Now I don't have to bother my guy pulling out the entire shop to see what works and what does not color wise.
Safe rides once you get back on the road again! Whatever color scheme you decide on, it will end up being a great ride I'm sure.