After lvling to 40, I'd have to say that MCH is pretty underwhelming so far.

The one and only combo has an annoying RNG factor to it, which makes me have to stare at the bar a lot more than I want to, just to see if it proc'd. Sure Reload guarantees the proc but the cooldown is rather long.

I'd much rather it be a guaranteed proc and Reload just to boost the damage of the skills or something.

For the turret, there's nothing much to say about it. You place it, it's there shooting at your target. MAYBE making it follow you around would make it more interesting. Wouldn't need to recast it everytime you move somewhere, and with Promotion, your positioning would add an extra element of strategy. Just a thought.

Haven't had much trouble leveling, the DPS isn't too horrible, cross-class dmg buffs are necessary though.

Overall, it just feel kinda clunky, there's no smooth rotation, so it's not very fun for me. Think I'll go back to playing DRG to 70 for now.