For Mario Kart, Koopa Troopa and Yoshi were great for intermediate play b/c very forgiving, great turning + acceleration. However, you were going to lose to a well played Bowser/DK that didn't make mistakes b/c higher top speed (SKILL CAP).
That's why most of you play melee. Brainless easy train town. If that was viable at top end tournament play the game would be in serious trouble.
I played rogue for 2 years, I got 2900. I played lock for THREE DAYS and got 2920. Your statement is invalid. Casters are SOOO much easier than melee. You get to play, you have more than one trinket, you have spam-able cc and you have a ranged kick. Go away