3.0 is when sorcs got buffed and ended the reign of operative healers in ranked and regs. Operatives did well against dot comps but the real counter to dot comps was burst dps anyway. Also sorcs were stronger in 3.0.
Operatives are right now and have been for a long time the king of wz's. Sorcs are harder to kill but in terms of raw hps, operatives surpass sorcs and thats whats uncoordinated regular wz's are all about. This is hard to see because sorcs newly found viability in 3.0 energized the most fun healing class in the game, causing a mass re roll from the top down and with such a small amount of hardcore pvpers still playing their operatives, you just dont see that class dominate like its able too. On a side note I think that giving op's a 30-45 second vanish would solve its problems. Assuming its still like 2 mins.
This game has been on life support for a long time and this is the reason why mercs are still trash when they should be great in ranked, and why sorcs were given a dumb ability like phase walk. This wont change and is only gonna get worse so I would recommend accepting that Operatives belong in wz's, mercs suck, and sorcs belong in ranked. Hots for regs. Burst for ranked.