The new hargh'peng torpedo looks flashy. The good initial damage is balanced by its long cooldown and the fact that it doesn't work with High Yield. The radiation DoT is harmless and can be cleared by Hazard Emitter. But the final radiation damage is quite substantial (~5K minus resist directly to hull). And here is the ingenius part:
Clearing the radiation DoT does not prevent the final detonation.
Shoot a player with hargh'pengs, wait 15 seonds and watch him die. I suppose if the ground revamp is only half as balanced as this new item, we will all have great fun once season 4 hits.
Since I have the utmost confidence in Cryptic's ability and determination to preserve (or if necessary restore) the balance of the game, I am sure we can expect either a confirmation that this is indeed intended behaviour or a fix by the end of next week.
EDIT: It seems the final detonation is triggered multiple times depending on how many ally ships are nearby, up to a maximum of 10. This means that a single torpedo can do ~35K hull damage after resists.
I hate to say it but cryptic needs to start putting in some actual effort in balancing this game before it dies completely... right now its going through the slow mmo death if there were multiple servers at launch we'd have seen many of them shut down by now, my guess is whoever buys cryptic either guts them or makes sto F2P its really the only option to save sto, if even that is enough at this point.