Ninja is a lot more straight forward than their 3.0 counterpart. One DoT that's attached to your slashing GCD, only a few new abilities on your way to 70, and a very forgiving rotation. If you're looking for a good, all-around Melee DPS that brings raid utility, try Ninja.

I think you answered your question in your post, too. IMO, use your daily roulettes to slowly level Samurai to 62, and see if you like how they play then.