Since Wildwood Rangers don't have a real porpouse as of now in the game, being that Asrai Spears have pretty much the same role and are cheaper, I started testing them on custome battle.
When I was waiting for the battle to load I noticed that on the unit specifications, on the loading screen, Wildwood Rangers are described as Anti-Infantry rather than Anti-Large, which is what they are right now.
So, this got me thinking. Maybe they were supposed to be anty-infantry but someone got the wrong stat on them.
I think this makes sense, since there are too many anti-large units on their roster and no way of countering infantry with infantry.
I think this would give them some purpouse. That would make them some kind of "Greatswords" comparative on the Wood Elves roster.
Hope this helps