Correct me if IM wrong

[Catapult]

The people who didn't level their classes properly are whining about THM/CON roles, claiming that making Sentinel mandatory makes the game inaccessible, and all around Q.Qing in an endless sea of misguided laziness.

And even then they've made it easier for us by bringing Sentinel down to be obtained at Level 22. Most cross-class skills are even low level as of the incoming patch, so it's not that hard to get the "prerequisites" for a chosen combat role.