I like to add few ideas to the table,
1. Since SWTOR is in a area with the promoting of Cartel Points, maybe incorporate a reward system for Open World PVP. What I mean is if lets say your faction holds a area your group gains CP points.
If geting some cool stuff in the Cartel mall means looking cool and having fun, Open World could be added to the table and players could gain cool stuff by PvPing for it in Open World.
That option would benefit and would make PVP fun.
2. DO NOT GIVE US PVP GEAR WHERE GEAR IS ONLY OBTAINED THROUGH OPEN WORLD PVP, AND IF YOU DO MAKE SURE ITS JUST COSMETIC WITHOUT STATS!
I remember watching people get battlemaster in a few hours with the mass amount of zergs and exploiting, it was hilarious but at same time was a fail to the game and we all know what happened after that.. /unsub x 1000's
3. Some how don't make it zerged, there is some people that have toasters as computers lol.
I don't know how they can do that, maybe make zones where only a limited few can enter at a time, make a instance zone where you have to Q, and only lets says 40+ can be in it.
These are just a few things in my head that could fix Illum, maybe I am wrong and my ideas are retarded, least I am trying to dream.