I haven't killed EX yet but I have done a fair few pulls. I have not played any of the Monster Hunter games.

With the above in mind, the main problem I see is the fight appears to be designed for players who control characters with high mobility. But this is something FFXIV doesn't have. Sprint has a super long cooldown, only some classes have abilities that help them get out of an area fast but they have a long cooldown, and nobody is able to roll. So we're left with little more than basic movement for a fight that very much appears to demand more.

The mobility issue is amplified by server ticks randomly going against you. There are times I dodge fine, and there are other times I appear to dodge fine but I get hit anyway. I'm hoping this was a latency issue because it was patch day. I rarely have issues dodging anything in this game telegraphed or not, but the server ticks sometimes punished me hard on Rathalos EX.

I think the idea for the fight is super cool, but it is a bit dull that we tackle 90% of the fight by just running around. Extra buttons to do things like roll and jump would have greatly added to the dynamic that avoidance is key to winning.