Kray at AskaJedi wrote an excellent article on “the hybrid tax.”
I don’t know if I trust Bioware to completely balance out the classes. I like to build my characters for survivability, as I tend to play solo at lot. I was thinking about rolling a Jedi Guardian at launch since it seemed to have better defense than the other LS classes, but now I don’t know if I should roll a pure DPS class or not.
In the end, I may just stick with Kray’s advice and just pick which advanced class that I want, meaning the one that sounds like it would be the most fun to play. As Kray points out, this will affect how I choose my companions. Maybe that is how EA will strive to achieve balance in the game, at least in PvE. The variety of the game comes from your companions and how you use them. Genius! Players can whine about how OP a class is, but in reality, it is that particular class with those companions. Bioware can always state that the classes are balanced, just not the companions.