I have generally belonged to the camp that feels that Micro 4/3 lenses really only make sense if they are small.
The lens that bent that reasoning was the PL 42.5/1.2 Nocticron. That lens is special in a way that makes it exceptional independent of format. I want to shoot it all the time anyway. It is technically sound, yes, but also deliciously organic rather than sterile. It's near the top of the many 85-90 mm equivalent lenses I have used.
So my curiosity about the new 12/1.4 stems from the same place. It's generally large, which starts it off at a significant disadvantage. However, I am curious to establish over time if the rendering is at a commensurately high level. That would make it like catnip.