What specific "hybrid" are you saying is underpowered? If you're trying to use two or more of the three main stats to do your base damage and CC, then yeah, you're going to have problems. But that's sort of like complaining that a character who gets to level 5 in bows does more damage with a bow than someone with 3:3:3:3 skill in 4 different weapons categories can do with whatever weapon they decide to pick up.
If you instead make a hybrid that focuses on one of Str, Dex, or Int, and then maybe dabbles in one of the others, you'll be fine. A truly balanced hybrid gives you versatility, not power.
