Endgame content always has been and always will be the defining grade of an MMO, from EQ to WoW and now to SWTOR the success is always tied to it's top end. You can only level so many characters, only run through so many story arcs, SWTOR sought to bring narrative driven gameplay and so far has done so very well. But if they fail to properly expand the endgame content it will not thrive, only wither, something Bioware is definately aware of. I hope they bring a new flavor to endgame raiding, as there are only so many kinds of fire one must not stand in, but that raiding will need to be there. Progression is simply a natural growth from it, and stems well before WoW, FoH and Furor are reknown for pushing content in EQ, WoW simply recongnized that as a draw and catered heavily to it. Achievements only serve as a system initiated timestamp, the reward has always been moot, an icing on the cake for endgame raiders. We always pushed content to push ourselves. SWTOR will cater to it, hopefully not to the extent that WoW did, but it will. After all, if there wasn't a best on your server, country, region, or world, how else would you measure yourself to push yourself higher?