So Why assume removal of Classes?

[Snugglebutt]

What is far more likely to happen is splitting all current classes into two job choices while at the same time in future occasionally bringing out a new class that will also be split into two options when all current classes have two options each. Such as choosing between PLD or DRK, Ninja or Samurai, BRD or whatever the Gunner is etc. An alternative is the advanced job types which was mentioned a long time ago as possibly bringing out with current job+job equals advanced job. Also keep in mind they would not have added a new class with the rogue if they were planning to remove classes few months later, no new classes in 3.0 could very well mean they have all the classes already added to game which can be used to apply the new jobs which will be the second choice of job on preexisting class.