I disagree. Most mmo's do raise the level cap for endgame content but are still available to the lower leveled as well. If a raid/strike is level 34 and the expansion raises the cap to 40, the raid/strike gets a raise to 40 as well but keeps the 34 version for those who don't expand. They shouldn't block endgame content and make it mandatory to expand. They should make endgame content appropriate to your level of investment.