I mean, Pugilist was the first class I played because I liked the concept they posted. It's a lot different now than it was at launch and to an extent it's kind of scary to see how we're going this MP Consumption -> Damage route but it's hard to put a critical eye on it until we actually see how it plays out. For instance:

Let's say the stances consume MP over time and not per hit. Do they only consume MP while active/engaged or do they start consuming MP per tic as soon as you activate it?

What if they consume MP per hit? Does it only consume MP during auto-attack rounds or does it consume MP for Light Strike/Pummel/Flurry as well?

Let's say I use the offensive stance. Does the attack bonus apply during my weaponskills?

There are too many variables about the actual stances themselves that we don't know to be critical about them. Plus at the moment, our damage output is far from terrible. So even if these stances can only be used for limited periods of time because of the amount of MP they consume, it isn't like it'll break Pugilist/Monk. The only time I even come close to running out of MP at the moment is fighting Ifrit and screwing up so I have to toss a cure. If anything, this'll be an issue for lower Pugilists if these stances are like 30 as MP Management is harder at lower levels but I still can't see this being an issue at 50. Maybe I'm just being overly optimistic or something.