Fenric said:
Thats just it though, when you interrupt / take your delayed action it is no longer the enemy's turn (for the duration of your action) , therefore any reactions can be used as normal.
A really solid solution. Unfortunately, the delay description makes it clear that it ends your turn. So, at the very least it's a new turn (though nowhere does it indicate that you create a mini turn) so keyword limits still don't apply, at the very least.