Firstly, I apologize if this is the wrong place to report this. Also, as the title says, major spoilers. You've been warned.
I came across a very overpowered glitch regarding the lone wolf perk. Once the respec demon is available in the homestead, if you use him to reset everything, you don't have to re-pick lone wolf, allowing you to get companions/henchmen while retaining the redistributable ability points you accumulated with lone wolf, thus having double abilities as well as a large party.
Actually less exploitable and more punishing.
If you choose lone wolf at the beginning and respec so that you don't have it you do keep the ability points however, you still can't recruit the companion/henchman and you miss out on the AP and HP bonuses of lone wolf.
In my party I had one character with lone wolf and one without. Choosing lone wolf again on my respec'd character who had it originally got rid of my other character's companion slot. Not choosing lone wolf leaves me missing a character slot, keeping the ability points, but losing the health and AP bonus of lone wolf.
Pretty broke.