MNK's main issue is the complete loss of GL3. Thie should be tiered. Or if they still refrain from making it a decay loss of GL i.e. 3 > 2 > 1 then certain abilities like Steal Peak, Shoulder tackle should grant 1 charge of GL. As it stands primal fights running to next mobs will always be a huge dps drain on MNK. Yoshi said slight changes are heading to MNK so lets hope that it is something related to GL. As for Haymaker, in 1.0 it used to be my most loved ability, but MNK was also able to tank in 1.0 (yes it tanked primals) but in 2.0 it doesnt have that utility sadly so maybe a rethink of its application?

Either way if MNK is able to maintain DoT's fairly well, and maintain GL3, they damage goes through the roof. As previously stated, MNK is stat based more than others and gear will really make the difference if topping the dps parser is your thing but seeing as how unreliable they are, should they be?