It... should be left as it is, in the original state from the retail.
HTL Volition Bravos just doesn't feel right. It should be ridiculously low-poly and cheesy as it is, the scurviest ship in known universe. Arrr.
However, having something entirely different but equally ridiculous in the game from the SCP team would be cool as well. Just not to replace the Volition Bravos. Like, I dunno, space ninjas! A wing of huge space ninjas with SCP team faces or avatars as insignia.
They could be firing exploding throwing stars.
Or, perhaps a space shark with laser (beam turret) attached to it's head.