The downside is that you're watering down your main role. The multi-class is just suppose to be some additional flavor / flexability, you're still supposed to be able to be a defender, striker, whatever your main class is. If you're replacing all your class powers with multiclass powers from different multiclasses, and using up all your feats on it, you're not going to be effective at much of anything.hennebeck said:What do you think the downside would be of allowing 3 classes?
Why did they decide to limit it?
You still lose a feat that could have been used for something else.