Originally Posted by lensjunkie
...I am wondering if users who have moved from the M8, to the full frame M9, find lenses with a farther CF easier to use...
Well, consider that with the same lens, the M9 shows a wider field of view, perhaps leading to a desire to get even closer to the subject to fill the frame the same.
Looking at it from the other direction, consider that the M8's "crop sensor" gives a narrower field of view for the same lens, vs used on full frame, thus it appears "closer" for a given focus distance.
So, on that basis, I'd say "no" to your question; just the opposite.