PvP as it is now is great. But yeah former WoW casuals are ruining it each and every day. 80% of the people queuing in warzones are terribly bad at PvP. Premades have to carry 4 noobs each and every time against other Premades that carry another 4 noobs. There are so many people out there that suck so hard at PvP, but they still queue, no matter how many times they get roflstomped or flamed to death by team-mates.
Yesterday for example there was this guy in Rakata and Columi, no PvP gear, rank 62. We asked him 10 times before the warzone started to change his gear to PvP or he'll keep getting hit for 7-8k's. He kept yelling at us that we are noobs and that he is far better than us in his Rakata/Columi gear. He ended up voidstar with 45k dmg and 10k healing in his Rakata Gear dyeing 28 times.
It's not the system really, the system is great ... is bad people that are ruining the experience of others.