I am trying it out right now, and it seems to work out well. I normally never use my left thumb to actuate the space bar, so I am trying to use my left thumb to shift and my right thumb to space. As I almost never use my right pink to shift, I always feel like overdoing my left pink.
At the moment it feels nice and I will continue trying it, if it works out fine for the rest of the day, it could become a keeper.