Ready actions can be exceedingly complicated. So unless they want to narrow it down to just a few parameters theres no way they could implement it in a way thats even remotely close to what it is in pnp. Just impolementing the combat part though should be easily done, right? We already have attack of op in the game. So making a 'hold attack until enemy in range' function shouldnt be that complicated to do right?
Im just guessing here honestly. I cant code so wouldnt know. But it seems to me that alot of the code for attack of op could be reverse engineered here.
