A small one thought from me - I simply don't understand the worth of Plasma cannons, and in the face of the impending ability for DA terminators to use them, I thought I would ask for help.
My problem is this. With the exception of deepstrike, I rarely see an MEQ player of any competence cluster his troops up - to stop blast templates. Now I believe you are compelled to place the template with the hole of the template over the target miniature. Therefore, if accurate, and if my experience of competent players holds true, the plasma cannon will kill 1 MEQ in a turn it hits.
If it misses however, there is absolutely no way to guarantee which way it will scatter. So you can't rely on the 2/3 chance of a scatter to get more hits.
So, 1 shot, gets hot, not Instant Death as S7 vs MEQ T4; what actually is there to like compared to any other HW out there?