^Yes, it's well known. MNK is the only DPS class that need to think about refreshing their DoTs if a boss jump.

...or not.


Neither NIN nor MNK are "hard" to play. The skills they received from lv60 actually make them even more easier to play than before. But people in this game doesn't need much to label something as "hard", so yeah, it's definitely all about your own skill.
Although one would point out that having a decent WAR in your party is really appreciated as a NIN.

The "I'm better than you because I play Monk" mentality is real, but you'll notice that only bad players bring this up. From my pre-3.0 experience, DRG, WAR, NIN and SMN were harder to master than MNK.

As for those "Mudra-lag" stories, is it a reason not to play Ninja? Nope.