Hi All, just to give my input.
Canon 50mm 1.4 - Front focused, I fixed this with a +13 micro adjustment
Tamron 17-55mm f2.8 - Focusing at all apertures seem OK under 3 meters. Over 3 meters, I need to change stop to f4.
Tamron 70-200mm f2.8 non-vc - Was front focussing, +3 adjustment.
HOWEVER, at 2.8, any distance within 3 meters, no issue at 2.8. Any distance over 3meters, I need to stop to f4 or f4.5 to ensure sharpness. No micro adjustments help here.
So it seems large aperture at distance can be problematic. I must still do a more scientific approach, but this seems to be happening to me.