I was hoping the split might actually give the opportunity to mess around with what he is, so one split for, yes, the pure super killer warrior, but perhaps one split to represent a Warrior going a bit more force-y or able to hold a conversation for the more RP elements of the game. Options of character progression other than "tank" or "blitzer", which I assume your skill choices do for a Warrior anyway.
(and indeed, there is another issue with it- what are these advanced classes doing, conceptually, that simple skill choices can not? Even the Marauder as a concept doesn't strike me as a good 'advanced' class, as surely a Warrior can be all out offensive anyway, depending on his specs. Why do I need to change to a Marauder to do that? Why are Marauders the ones specifically with two sabres?)
Not that we know what the skill choices are for the advanced classes, so perhaps more broad options are in there. But the concepts given now just sound pretty boring. And the juggernaut being able, apparently, to mess around with the 'energy levels' of his opponents sounds depressingly WoW like to me, not Star Wars.
So really, I don't think there is any point of advanced classes if they just give you options that should have been part of the base class anyway. They really should give some significant change/development to what you are.
Maybe some of the advanced options for other classes will be better. If a Jedi Knight also gets a tank/offence split though, then this concept is looking dodgy.