Alright... interesting build. It doesn't match my playstyle (can't stand polaron for some reason), and I personally really don't like the hargh'peng. Here's how I run my qin, so you'll see the differences.
I forget my duty officers, but you can see what the basic idea is behind my ship. Use disruptor breach combined with APB2 to basically optimize my damage on the target, while I also have APO3 in case I need to add a little burst damage. For defense, I have EPtS, and for power balance I have EPtW2, mostly out of habit leftover from my fed side, but it still works well. The science consoles are kind of must haves, with giving me additional resistance to holds, and also gives me anti-drain defense. The borg module is just there because it works. On anything. XD.
Sooo yeah, slightly different plans there. But overall, your build is interesting, but needs a few tweaks to optimize it. Listen to biteme, he knows his stuff lol