I think we need to be realistic. I could be wrong, but I very much doubt that Larian would be willing invest the time and money to modify their combat system to the extent that it would allow for us to act on an enemie's turn, as appealing as that may or may not be. And I agree that we don't want to waste our reactions, which is the point of the discussion. I'm just starting from what we have now, and what we are going to get (i.e reactions that blindly trigger on the first opportunity), and looking for a way to give us more, even if that "more" is still far short what we would ideally like to be able to do. In other words, it's not "more control to the player" in the absolute sense, but relative to what we currently have and with realistic expectations of how much work would be needed to get it.
All in all, I think we're all in agreement about a lot of things, but I'm getting the impression (rightly or wrongly) that there is some miscommunication afoot.