Are you sure you want to sell your Sony gear? I see you sometimes use zooms and some could be smaller and lighter for MFT but for primes maybe consider those compact G Sony lenses? I've been impressed with the 24mm f2.8 and there's the 40 and 50mm f2.5's and old 35mm f2.8 which I think is excellent.
A thought on zooms. I have the Panasonic 12-35mm f2.8 and there's no real saving over the Sony 28-70mm f3.5-5.6 and the new 28-60mm could maybe save some more weight. These Sony lenses are f5.6 at the longer end but once you apply the crop factor which I think goes for quality as well as dof I think things work out pretty equal.
I keep buying MFT stuff but I wouldn't like to lose the quality I get from my A7 and with a compact prime on the A7 IMO MFT has no real advantage unless you go for something really small like the GM5 and 14mm f2.5 or 20mm f1.7.
Just thoughts