- Flurry of Blows (Prone): strike damage + imparts the unconscious state, like the sleep spell or slipping in grease do. - Flurry of Blows (Shove): strike damage + shoves the target, as per shove. - Flurry of Blows (Shocked): strike damage + imparts the 'shocked' condition (complete with electric effects) as per shocking grasp or electrified puddles.
I think you are giving them way more credit than what's should be. I think there will be just a single button, with only one of these options, and the other two will go to Hel.
Which one they will implement? I'm inclined to say it's #2 - after all, Shove seems to be their favourite. Then again, #3 will probably create a surface, and they also love them.
So, chances are, with monk we will finally see the pinnacle of Larian's creativity - The Shove Surface. I have no doubt that all shove-loving knaves will go absolutely ecstatic with such a marvellous concept.