In my opinion, rangers should have the option between choosing to specialize in a type of biome (underground, forest, etc.) and gain physical benefits, such as skill training, ability to ignore difficult terrain related to your biome, etc. or be able to use ritual magic from arcane, divine or primal power sources.
I think rangers should still also get a fighting style. For example, a two blade ranger gains feats from the dual wielder specialty as bonus feats, along with other benefits, such as being able to take disadvantage on each attack in exchange for full damage on each one while benefiting from two weapon fighting, while archer rangers gain bonus feats from the archer specialty, and gain exclusive benefits too.