Well as a PS main that drives on a lot of raids. Not sure I really want ANOTHER debuffer for impact as Basilisk, Salamander, Chili Popper already is a lot for a level 8 reactor to deal with, in addition to Decay/Atrophy/Burden/Menace etc. Even my 5 slots I have too many toys to equip that my TAO, Diaymo, QSP, etc have to sit in cargo with all the debuffing. And thank goodness the PS has a level 9 shield to take the beating from GL/Menace/Triple Debuffing at the start of a wave.
I only use my 5 gravity link to get first aggro 9k+ out, that is the PW's job on the raids. And also impact debuffing is the Terran's job.. The group cooperation for buffs/debuffs is always a part of the game. I'm sure everybody would love to be able to debuff all the ammo types they can use, but not how set up to run as a group environment. Also my repulsor fields on the TE/PW/PS is a nice little damage bonus for the tanks taking their beatings.
Few would say a JE is a poor raiding toon with DEA turbo/reactor boost. Sapping for power. Group cloaking. Rallying cry to remove menace (great for Fishbowls and GoBB.) CC would be nice, but they do quite well without it.
We all raid differently and have likes/dislikes for classes and equipment use. But to claim the JE and PS aren't raiding toons is really a stretch.