While I get the theory behind no dead levels, the ability they have now is stronger than it was when they got more at those levels, even if they get it all at once. It seems weird to ask for more to compensate for a power boost.With the changes to wildshape, it seems the shifter is now left with completely dead levels at 6th and 18th. IIRC, one of the design principles of Pathfinder was to avoid dead levels which plagued 3.5e.
Is anything going to be added to the Shifter at those levels to compensate? Perhaps something like bonus feats, a la the Cavalier? Seems odd to have a full BAB class with no bonus feats...
Well, it's less asking for more power and more asking for something to fill the void, and make the class more interesting. You can add additional abilities without directly increasing a class's power, i.e. Track and Woodland Stride. That said, a lot of people are still underwhelmed by the Shifter's power, so I definitely understand asking for more, even with this change. Bonus feats are a good way to add a slight boost to power, but another thing they could do is maybe give the Shifter the ability to Wild Shape as a Move action at 6th and as a Swift at 18th.