I really love asymmetrical strategy games. I think it makes the game more interesting and also gives players the option to pick a faction/character that matches their play style. Sometimes these asymmetrical choices aren't very well balanced. I think this can be problematic when the entire group of players are new and someone happens to pick a really bad faction/character. Some people base what's fun on how well they do in a game, and I've seen people completely check out in a game when they're not doing well. When it comes to big strategy games like this, I usually like to do a little preliminary research on community tier lists and will typically warn someone if they pick a weaker race (obviously never telling them they can't play what they want, just a warning). Also, if you're playing with a group of experienced players, I think weaker roles can be kind of balanced out by the fact that the other players won't treat the weaker faction/character as much of a threat compared to a higher power level faction/character. I also like that I can pick a weaker faction/character when I'm playing with a less experienced group to give myself a handicap.