I've often had half-finished LW post ideas and crossed them off for a number of reasons, mostly they were too rough or undeveloped and I didn't feel expert enough. Other people might worry their post would be judged harshly, or feel overwhelmed, or worried about topicality, or they just want some community input before adding it.
So: this is a special sort of open thread. Please post your unfinished ideas and sketches for LW posts here as comments, if you would like constructive critique, assistance and checking from people with more expertise, etc. Just pile them in without worrying too much. Ideas can be as short as a single sentence or as long as a finished post. Both subject and presentation are on topic in replies. Bad ideas should be mined for whatever good can be found in them. Good ideas should be poked with challenges to make them stronger. No being nasty!
I agree with some of your points -- well, all of them if we're discussing control systems in general -- but a couple of them don't quite apply to brains, as the cortical systems of brains in general (not just in humans) do use predictive models in order to implement both perception and behavior. Humans at least can also run those models forward and backward for planning and behavior generation.
The other point, about actions determining perceptions, is "sorta" true of brains, in that eye saccades are a good example of that concept. However, not all perception is like that; frogs for example don't move their eyes, but rely on external object movement for most of their sight.
So I think it'd be more accurate to say that where brains and nervous systems are concerned, there's a continuous feedback loop between actions, perceptions, and models. That is, models drive actions, actions generate raw data that's filtered through a model to become a perception, that may update one or more models.
Apart from that though, I'd say that your other three points apply to people and animals quite well.