there is nothing wrong with a bike being a little heavy, I feel you are kinda shooting yourself in the foot riding a bike this light. Firstly it's never going to be that strong or stiff (proto super light front rim with fewer spokes? No thanks). Learning to ride with a super light bike is like learning to drive in a super car, sure it will feel nice, but when you ever ride a heavier bike (because lets face it, you wont always have a bike this light) it will feel like shit to you. Because the bike is so light, you won't have to put as much energy and technique into riding and it may feel like it's improving your riding, you're actually doing yourself harm.
I think you should give the weight saving obsession a rest, get some more practical parts and use a super light bike for when you are in the world champs. (mainly talking about tyres and stuff her)
Other than the bike not really being practical for every day use, it is pretty good looking.