I've started the Adventure Path, and so far am loving it. I have a 5th player who will be along, and after learning about the Free Archetype Variant Rule, they were very insistent on wanting to use it. The rest of the players agree, but ultimately care about my input as a DM, and all are willing to play with or without it. I personally love Free Archetype as a DM and as a Player, but I am nervous about using it in a AP. Should I use it? Would I have to change the modules if I did? Or just be slightly more of a "hardcase" when it comes to the rules?