Other than their appearance, I don't really have much opportunity to differentiate the Ranger I make from the Ranger someone else makes. Mine may look different physically, but the stats are likely either exactly the same, or very very similar.
That's more of an overall DnD problem, no? At least now, while there is no multiclassing there are objectively useful and unuseful ways of investing your points. Atrribute system is not something that really gives players much choice in DnD.