I dont understand the need to use a tiny little axe like that so hard as a hammer that you wreck the eye... It's just a lil guy, why would you use it as a drilling hammer?
Not saying I don't want a hardened poll on it, but if you go tanking up the little axe otherwise, it turns into a big axe on a little stick. Prone to its own set of issues then, even if that's my personal preference.
But along the lines of making it more usable with the hard poll, reducing the taper from the bit to the poll would add meat to the eye area without needing to thicken it too much, perhaps even allowing enough room on the side to hump it up along its whole length a bit without making it look like a rhomboid. That would give that raised centerline that seems to be so hard to find in new designs and add significant reinforcement to the eye vs collapsing from hammering, maybe not with much or any extra weight, depending how they execute it.
Its a nice sized tool, and it reminds me of a baby rafting axe. I'll probably get one just because of that unless they get away from that aesthetic too far.