To those who have experienced vf difficulties with the M6 - I'm not trying to downplay/discount your experiences & I hope you will not be offended by my post. I also understand that I might have yet to encounter the light conditions that you've experienced and maybe the experience is dependant on the way our eyes are physically structured/condition. But just to get a bit more clarification:
1) I've experience difficult lighting conditions such that it was difficult to view the framelines of the M6 & M5. Under these conditions the framelines of the M3 were still visible. Is this the effect of flare & the reason for the M3's superior vf?
2) I understand that the RF patch of the M6 could white-out, but for me under those conditions so would that of the M3 & M7 (with MP finder). Could it be that with the M6 it is just easier to have your eye off-centered resulting in RF patch white-out?