If you loved the HW MNK, you'll probably like the SB one, the only thing who really changes the gameplay is the loss of Touch of Death, and the more frequent use of Forbidden Chakra; But MNK is almost the same that it was in 3.x. Consider that the job is still fun, but we didn't get many new toys to play with... RoF slows us but it's a really strong ability, RoE is pretty situational but still used sometimes, Brotherhood isn't that strong but still is a party-wide buff. However, Tackle Mastery's utility is literally a riddle.