That the nomads are silly op? Offhand, their iguanas are stronger than many destroyers in a one on one engagement. A couple of their weapons are way too few OP for what they do. IIRC its the double electron mazer that goes in the large slot. Beyond that I can't be too sure since I just auto avoid any nomad fleet that I can, they are too strong to be worth fighting.
As for losing a lot after the new update, the update changed the strength of all fighter class ships drastically, and the AI actually acts in a sort of rational manner every now and then, so if you are used to just rolling everything over piecemeal it will be a lot harder now.