@HOBO, in particular - If you check out the latest post on my blog, I discussed a way in which I'd like to see pinning work in 6e that I'd love extra feedback on.
Regarding the list...There are several things I don't like to be honest, but I'll try to discuss things not previously mentioned.
Close Combat Weapon upgrades are ONLY useful in a Blob, you have T3 and piss armour, you simple can't rely on surviving until combat happens, nevermind until your shitty Initiative gets to go, especially with a Fist (which is only S6 anyway, and thereby bollocks.
Even if combined, squads that provide nothing but Lasguns and not even a Chimera are not actually providing anything to the list. Even a Heavy Bolter would be better, and I hate single HBs on any unit like you wouldn't believe.
Plasma Pistols are massively overcosted, and risk killing you, especially with crappy IG armour saves. This is insane on a Commissar, as he's the single best guy in the unit! lol.
Finally, a free FA? Does it cost points, or COMPLETELY free? If the latter, then it's MoneyHammer, not WarHammer 40k - but even then... You're missing a trick if you could have a free squadron of 3 Vendettas (or, better yet, Devildogs with HF Hulls...)