Players shouldn't be rewarded with combat advantages because they've spent time playing the game. Combat advantages need to be acquired through learning and mastering the game's mechanics for the it to feel truly rewarding.
Stacking statistical bonuses on top of mechanical mastery that will come naturally through experience will not amount to a balanced experience to anyone. Such a system is inherently unfair, especially in a game like M&B where experienced players already have such a massive advantage over newer players.
