One thing that's kind of odd is that the Heavy Plasma Torpedoes don't seem to track my B'rel after I go back into Cloak... but normal torpedoes? I can hit Evasive, go way beyond 10km, and they will still hunt me down unerringly.
they're definitely a challenge, i'll give you that. and if you don't have polarize hull for whatever reason, pulling off a few of your damage resist powers does help, in addition to bracing all shields to one side.
the REAL issue though, at least i feel, is that our weapons suddenly have bad accuracy when we target them, preventing us from reasonably shooting them down until too late.
I just keep a torpedo spread in reserve until I have a number of the plasma torpedos chasing me, then turn and launch the spread (takes out every incoming torpedo and damages everything else in the area).