I know that they are not really broken but wondering if they need do have the added wording of can only equip on small or medium like the D-Caps. I say this because I have never seen boarding troopers run on anything but an ISD.
From the articles when they came out I think they were meant to allow smaller ships like the hammerhead or the quasar to hit above their point value. But it seems they are mostly being used to allow ISD's that already hit hard to hit harder.