I understand your frustration. As a reasonable and observant individual, I'm sure you must have noticed the substantial discrepancy between the green bounding box and the actual bounds that were being made available to turrets (or fighters and such). I'm sure you can agree that at least one of those two must have been incorrect. As such, a change to the docking was inevitable, the only question was whether it would be to the green box or to the actual docking mechanism. I, for one, believed it would be to the actual docking mechanism, but apparently mainly for the wrong reason (because it was impossible to depict it with the green box accurately - but he didn't change the thing which caused this - the requirement for the core to be centered!). That requirement, which diminishes the available bounds if the core is non-centered, is probably continuing to cause confusion.
If I'm seeing this correctly (using 0.09396), a 7x7x7 ship can dock on a single mount at this time still, but each extender now adds +2 instead of +4, and height also appears to be fixed (it was previously increasing by even more than +4). If memory serves, +2 is how much the green box increased by previously per extender (but it wasn't lined up with the edges of tiles properly for whatever reason, which also appears to be fixed now), so if I'm not mistaken he's brought the actual bounds in line with the green box, aside from the actual bounds still being less than what the green box shows if the core of the docking ship/turret is not centered on the x and z dimensions. There's no way to represent that, however, while placing the docking module+extenders, unless it's made to not require centering the core (as is already the case for the y dimension).