Redbadge
Explorer
Not entirely. First, I'm not "anti" Essentials, just feel they could have been done better. Second, that was just one example. Third, you still can't Hybridize them.
As for the rest of your post...
Those are located where? And are there similar feats for all the eClasses?
Of course, I agree. Every 4e class released so far could have been better. In fact, a few could have been alot better. The seeker, the original assassin, the original warlock, the revised original cleric, and yes even an essentials class in the vampire are all pretty bad/poorly designed. This is not something endemic to essentials, though I respect that you feel that essentials classes are not as good on the whole compared to earlier classes.
As for the MC feats, they exist in another form as Arcane Initiate and Sneak of Shadows in PHB1, otherwise they are identical to how I posted them. Every essentials class (except the vampire) has a multiclass feat and the ability to multiclass. Currently, there are no subclass specific multiclass feats, not even for pre-essentials classes. Additional multiclass feats for the subclasses will be coming along shortly, along with a multiclass feat for the vampire.