I can assure you that if I put a 50mm prime on my 5D (full frame) and then on my GH5 (mFT), the 5D focus will roll off noticeably more than the GH5. This is a thing to consider when using cropped sensors.
>A crop-sensor camera also comes in handy for macro shots. Recall that depth of field (DOF) is the distance between the closest and furthest parts in an image that will appear in focus. At the same aperture and for the same field of view, an APS-C sensor will have a higher depth of field than with a full frame camera.
I read your comment as saying that the exact same 50mm f/2 lens will produce less blur on an MFT body than on a full-frame body. That'd be a narrower FOV (~100mm equivalent) but the same blur as full frame. Perhaps I misinterpreted?