Pineteam - Your post has reminded me of the BA internal pilot safety report I once saw where the go-around of an A319 at LHR was discussed. They floated on landing and when it became evident that they would just miss the last TDZ marker, they went around. The discussion centred around how sound that decision was, and that this should always be the case if touchdown within the TDZ wasn't certain.
The distance to go on the runway in question (27R) at the point the g/a was initiated was circa 9,800ft, which to put into context is twice the length of runway after the correct touchdown point at Jersey where the A319 regularly operates and around 3x what is required to stop.
I did question the wisdom of such a strict SOP but, as my friend (a 747 skipper) said, safety is paramount with no exceptions.