I disagree that the only use Erland has is to get back other followers. He gives you a free vitality every maneuver to regroup phase (because there's no reason to keep him on when you move, you simply transfer him to your support area and get the vitality again after you move on), which is amazing especially when Gandalf exerts quite a bit.
I have lowered his aid cost, however, and changed other cards as suggested.
Thranduil