What exactly is the ranger bringing to the table here? Because I honestly don't see anything...
Here's a class I would like to see.
6+int skills/level
weapon proficiency as is
light / medium armor and shield (not tower) proficiency.
3/4 BAB
Strong Fort/Ref saves
Full animal companion
No spellcasting ability
Teamwork feats and animal focus are possible components of the combat style (see below).
Also keep situational stuff like wild empathy, track, and woodland stride
Add Ranger traps (these are cool, thematically appropriate, and unused enough in normal play that they seem new).
Add a "ranger-ish" combat style. Ideally, these would be more than just a "pick a feat" that the ranger has in order to more fully define the class. Archery, melee, natural attacks, animal focus. For example, an animal focus would give the animal companion more abilities (evolutions, maybe?). Natural attack style would grant access to natural weapons and some feats appropriate to them. One of these could easily be a shape-shifting tree.
Summary
Ranger brings skill points, combat style, and removed metal restriction on armor.
Druid brings full animal companion, and a lot of the flavor of the combat styles.