Mage of Spellford
Explorer
I'm not sure I understand the situation you're describing. If the knight refuses to retreat until his companions are away, then wouldn't that entail his being left alone momentarily, i.e. they are retreating while he is not? And yet it's described as a problem with individual initiative that the party isn't retreating as a group. It seems to me that's just what this player is describing their character as doing, but maybe I'm not understanding something.
That being said, why isn't it sufficient to declare an action to ready a retreat once the knight's companions are all safely away?
Hmm. Perhaps I should clarify. The issue is not that a single knight cannot ready an action and retreat after the rest of their compatriots it's more of a timing thing and a story thing. What if two characters want to retreat together? I'm not saying that it's not possible, I just find that it is unnecessarily awkward. Perhaps it's less the cyclical initiative and more the restrictions on readying and the action economy. Movement or action but not both.
I also think that it is awkward for characters to exchange items if they have differing initiatives. Without having a method to sync I just find some fairly simple actions to be possible but drawn out and unnecessarily complicated.
M