So, I'm a long time monk on FF14 and while I love the class and feel a sense of accomplishment when I play it well since it's possibly one of the harder classes to play at a high level (what with the positionals, optimal use of Perfect Balance, buff management, etc), I've been bothered by the fact that three of its moves don't seem to have very much use compared to other classes (most of which have a frequent use for all of their moves) in PVE content. Those moves are Arm of the Destroyer, One-Ilm Punch, and Riddle of Earth. For the sake of character usage, I'm dedicating this thread to One-Ilm Punch.
One-Ilm Punch is a non-positional move that has 120 potency, can only be used in Raptor stance, and does a 1 second stun that negates anti-stun effects (which I'm assuming means that it can be used as many times as you want instead of the maximum four since enemies gain a stun immunity each time you use one).
Now, for as long as I can remember, One-Ilm Punch has not be worth using for any reason since the 2.X series. It does more damage than Twin Snakes if you miss the positional (100), but less than True Strike (140) in the same situation. And since the former gives a 10% damage buff, even if you don't hit a positional, it's still worth using more than One-Ilm Punch. As for the stun, that may be slightly handy for solo content, but since it can only used during raptor stance, it's situational at best. On top of that, Leg Sweep is a role action oGCD stun, so it's much better in comparison, even if it doesn't do any damage.
The best way to make One-Ilm Punch more usable is to remove the stun effect and to increase its potency to 160 instead of 120, putting it in the middle of Twin Snakes and True Strike in terms of damage while still making it a non-positional. The other option is to give it the same potency as True Strike, but as a front positional, although that's much less useful in comparison. Still, either change would be really helpful in alleviating the drop in monk damage when they miss a positional, particularly during situations where the party is forced to stack in front of a boss for more than 5 seconds (a fact about monk I've gotten very tired of at this point). True North (a role action that removes positional requirements for 15 seconds) is helpful, but its long recast time means that it isn't up every time you're in a situation where you have to forego positionals. But honestly, True North shouldn't be that convenient as it would remove some of the skill needed to do play a class well).
That's my take on possible changes to One-Ilm Punch. Be sure to check out my thoughts on Arm of the Destroyer and, more importantly, Riddle of Earth!