As far as I know, literally nothing, I mean *nothing* forces you to use the mirror in the first place? So what exactly is the problem here.

If a player does not wish to use it, then you simply ignore it. What I'm trying to say here being able to respec or not changes very little. If a player wants to cheat they will find ways to do so and there is *nothing* you can do about it. I guess having the mirror in the game is more for players that thought they made a grave mistake and gave them the option to a respec if they chose to do so. It's more for min/max than anything else.

Also one must not forget that it's 2017 and not 1997.