D&D 5E OotA Ranger Favored Terrain

[Li Shenron]

I'm running OotA, and of course there is a player who is playing a ranger with favored terrain: Underdark. He's an elf who has drow as his favored enemy. Fair enough.

It seems unbalanced to give the ranger favored terrain bonuses for over 90% of the adventure.

What have people done to deal with this situation?

Nothing. It makes sense that the characters most suited to the job will be the ones undertaking the adventure.

 

[Horwath]

If natural explorer and favored enemy aren't used +80% of the time they are just a waste of class resources.

 

[Celtavian]

I just let the Ranger use the benefits. We have a bard in the group with Expertise Perception, so that double proficiencies isn't causing problems. The difficult terrain is helpful, but not overly so. I feel like this is one of the few adventures where the ranger can truly shine in his Favored Terrain. So I let him do it.