Before, I start. I don't want to see any posts criticizing those expressing their pros nor cons. Let's keep this clean.
Is it imbalanced?
1) Yes / No
For me, in Klingon vs Klingon PvP, the balance is relatively even. The only real differences is the experienced vs the inexperienced.
However, in Federation vs Klingon, there literally isn't any contest. In every Federation vs Klingon Space PvPs I witnessed since Headstart, Federations were greatly out gunned (witnessed from the Klingon side as well as the Federation side). Even the old Fed-Ball in Open Beta is no longer an issue.