Look I dont mean to be a downer on your opinion of the tank but you gota look at its efficiency in relation to its points and the other options.
Is it cheap at 80 points? Yea. Is it cheaper than a tac squad with similar weapons? Yea.
But what are you actually getting? Your getting a single shot platform that literally costs 80 points for its, albeit reliable, single shot.
Compare to the tac squad, in which marine bodies are already overcosted. For the same cost you get a las cannon and 5-9 bolter shots. So not only do you have the Las cannon that cannon that can fire at something, but the bolters that can fire at another, more appropriate target. So already it beats the hunter on shots per point and flexibility against multiple targets. And they are troops. Which is super useful in an army that lacks bodies. It also doesn't even do the job of filling out a heavy slot for detachments very well. You have cheaper or more efficient options. So when looking at this tank it's not how cheap it is. It's how good everything else is at doing its job better or the same, but able to do other things as well. You ideally dont want a unit that does one job in a marine army unless it does that job very well.