This refers only to tier 1. In no way am I suggesting any changes to any other tier.
IMO the only major change needed to balance tier 1 PvP is to fix the BO seats on the BoP to 1 tac, 1 eng and 1 sci.
In my experience BO powers are what determine the fight, and this is why the Miranda is inferior to the Tier 1 BoP.
The jack of all trades Miranda is no match for a more customisable BoP.
It's just T1, so who really cares? Most people are only in T1 for a few days at most anyways. If you really want to see imbalance wait until T2 and the lack of any Klingon cruiser to contend with the Feddies who discover Fedballs + Cruisers = win over a pack of thin skinned BoP.
And if you don't start learning to play well with others from here on out, you'll most likely lose 80% of your matches.