Who is disappointed with the Oly 45mm lens?

I owned the Panasonic/Leica 45mm lens and got consistently good results with it on my Panny GH2.  After reading the hype on the Oly 45mm, I decided that I could make a little money and get a little more "selective focus" by selling the PLeica and buying the Oly. I also liked the smaller size of the Oly 45mm.

I have not used the Oly that much, but when I have, I've been disappointed.  In general, the 45mm shots from my GH2 now seem fuzzier (even though I'm careful to keep the shutter speed at 1/125th or faster).  But even more disappointing are the colors -- they generally seem paler and more washed out than the more saturated/contrasty look I got from the PLeica 45mm on the same camera (GH2).

I'm wondering whether anyone else has noticed the same with the Oly 45mm on Panny cameras?  Also, does anyone have suggestions for maximizing results from the Oly lens on cameras where IBIS and "oly colors" are not in play?

Thanks...