When I get an axe with a worn toe like that, even as fresh as that one is, I'll take the heel and center of the axe back to match the length of the toe. I don't like an axe with a heel longer than the toe. They don't buck well because short toe doesn't penetrate the bottom of the cut deep enough.
What I do is draw an arc with a Sharpie such that the heel ends up even with or slightly short of the toe. I like to keep the radius of the curve of the bit close to factory as yours is.
With your axe I would keep that radius but swing the whole arc back to remove about 3/16" off the toe. The best way I've found to do that is hold the bit perpendicular to the bench grinder and follow my Sharpie line. In this way you'll remove material faster than it can heat up so there's no danger of losing the temper. You end up with a thick edge that needs a lot of filing but it's worth it in the end.
ok I did a bit of investigating into this and iv come to the conclusion that the image is misleading, or at least there is a little more going on than meets the eye.
When squared up the heel is indeed around a 1/4" / 6mm behind the toe.
This is because the eye hole is not completely inline with the poll, which changes the angle of attack of the bit. Im confident the symptom will not be displayed once hung. (note the ruler and the square are aligned but are not aligned with the poll as the hole is not parallel to poll)
view from top
view from bottom
note on the bottom there is more space between the back of the eye hole and the back of the poll. indicating the eye hole does not run true to the poll.
Meaning more space on the bottom than the top = changes the angle of attack/pushes the heel forwards and pulls the toe backwards = everything is dandy(nong) once hung.
but basically if you try to gauge the length of the heel & toe or angle of attack based off the assumption that the eye hole runs parallel to the poll then it wont come up quite right.
that was quite hard for me to try to put into words after a few beers lol, but at least I think its on point.
edit; was doing some test fitting and this probably shows it better than my words can. hang should close up a little bit more still once its worked down the handle properly.