You really don't need Aux Turrets and the Vesta would be OP with them - as it is, if you min/max your build you can simultaneously run high Aux and high Weapons at the expense of Shields and Engine power.

If the Feds do get the Plasmonic Leech in the next lockbox, that's only going to make the Vesta even more formidable and it's already in the top tier of ships as it is.