If you just needed the derailleurs, batter charger, usb stick, Blip box, and Blip shifters, the price wouldn’t be as bad. There isn’t individual pricing yet for the components
Looking at $1700 MSRP for that. I have absolutely no interest in changing my current crank, calipers, or levers so this is a pretty attractive route. I also like that you have essentially unlimited placement options for the shift buttons. I’m sold. My Trek SC is getting a complete overhaul this winter and just got a few more years on it’s life with me.
According to your table, Shimano is 633g total, not 733g 