Nolanoth:
I think the Lone Wolf is not planned to fully replace the companion. It is simply a possibility if some player don't want to have too big parties. This is an RPG after all and they wanted to give the chance to play without companions if some better like it that way. So in my point of view it is wrong to compare the ability and its effect. Quid pro quo.
As I know all skills have only 5 levels, so it would be extremely overpowered to give so much points just because a character took Lone Wolf.
Your idea would also ruin their concept regarding foe levels, since the enemies have fix levels, they don't level up with the characters.
