Dizzy Hargrieve:
My only problem with gravity-maces is that, as a technology, it only helps with an overhead swing. At that point you may as well use a full maul, because any kind of finesse it out the window.
Well, that, and you have to consider the ramifications of the tech curve being able to build a hardened gravity generator that's less than a foot long. That opens the door to all *kinds* of tech.
To be fair, TL4 has gravtanks. (Yes, they retconned that in Engines of Babylon)
They also have portable ultralight grav flitters. Artificial gravity. And grav chutes. And cutter rifles and a host of other grav-tech.
At TL5 it becomes perfect control, with shear rifles and so forth.
In my quest to make things realistic, I realized that Crawford had already done a lot of the work for me. TL4 has abundant grav control. They never come right out and say it, but even the starships are probably using gravitic drives to get around and spike-drives are probably utilizing gravity manipulation to tear open metaspace.