In most of the D&D-based games i´ve played, the agile characters wearing nothing more than a few magic trinkets always ended having far more AC than the fighters with 120kg or plates and steel
Which actually makes more sense. Like how DAO's armor and defense mechanics work. Heavy armor doesn't make you harder to hit; it reduces the damage you take instead. If someone is hard to hit, it should be the high-DEX, lightly-equipped rogue. You should be easier to hit the more you are bogged down with armor, unless you are inhumanly strong. I don't know of a game that actually makes your character easier to hit the heavier armor they are equipped with, though. One of the things that "sounds dumb" in a video game, but actually makes sense.
