I agree with your post for the most part. But I outline below where I have a different opinion, for the sake of argument, and to progress this concept.
Imo
Feeling and thinking are separate from ego, but ego starts to let aspects of each in more easily as it gets used to that sort of information and continues to reject the other(developing/differentiating the other function basically means to make ego accept this new type of information more readily), thats basically where differences in type come in. Ego grows as it learns to let in stuff, if it learns to prefer thinking much more over feeling, then it grows according to thinking more, making ego more thinking orientated.
I believe ego only 'lets in' what become beliefs and values and 'truths' etc. If I could make a conceptual model on the computer, it would look like a surrounding shell over the top 3/4 of it which represents the world, where we accumulate our perceptions and data (with the 1/4 bottom part anchored to the 'other side', which is where God and the life force resides), so we are seemingly more 'in the world' while alive than attached to the other side, which is actually a mis-perception, but one that seems real. Moving on.....
Actions and intentions are on the very top. Then thoughts and feelings are immediately below these, interacting with them, these are superficial too, even though they may feel deep because sometimes we have to search to figure them out. Ego exists in the middle
zone. Ego uses our environment (this is a 3D model) and thoughts and feelings and experiences to lay in beliefs and values which makes the middle layer, which serves as a sort of barrier, along with the whole ego zone. When our thoughts and feelings conflict or coincide with our beliefs and values, actions are the outcome, whether active or passive. This also explains why, to change our behaviors (actions/intentions), we truly need to change our beliefs, which then changes our thoughts and feelings, then our actions naturally change.
Below the ego zone is our unconscious. In this lies our core and below this our soul.
I'd make this in some graphic program but don't want to take time to do that.
When it comes to feeling and ego, i think there are few components to what makes up feeling. First off there is the personal unconscious and its structures, complexes(feeling toned associations around a common theme). When a complex gets activated it makes a feeling toned associations to things that are also connected to that complex and creates this bias towards the subject(based on other things associated to the complex) that originally triggered it.
YES! Well said. This is what I'm calling a belief.
When it comes to more differentiated feeling, it is when you are able to consciously make judgments by weighting these feelings that rise from your perceptions(internal or external, dont confuse with I/E), undifferentiated feeling just comes raw through intuition. Anyways, when these complexes gets triggered, its not something you can consciously review, what comes to your consciousness in a form of emotion is the response of your ego to these feelings that were triggered. This is also the reason why i think undifferentiated feeling often leads to mixed feelings about things, your unconscious mind says this is good through intuition very strongly, but it conflicts what ego would prefer since it prefers thinking(or the other way around).
Or, differentiated functions might just be those that are used often, so often dip down into our ego zone, that those pathways get very well used and cannot help but become efficient at knowing what our ego believes and what our mind/body/heart are used to. The good side is that it makes us efficient and useful, but the bad side is that we can get stuck in a rut using the same functions to tell us the same information, instead of using undifferentiated functions or challenging ego.
And all this constitutes our world, but when you look at it, it's just the most superficial half of our world!!! We build our lives upon it as if it is our foundation, but it isn't. We can't even see that it's our deep-seated beliefs that drive us, much less the deeper unconscious and, finally, soul. Which is probably why LOVE is so powerful an emotion. THE most powerful emotion. Because it is the closest emotion to God.
And yea, i dont think ego is a bad guy, but it doesent always want whats actually good for us, it just wants to do what its used to doing and wants to preserve things as they are, so sometimes it causes trouble and needs a little whipping to be able to move on and learn to grow out of its comfort zone.
Yeah. It's our functional foundation. We just could stand to remember that at some point, what we are standing on might need to be readjusted or reconstructed if we start getting warnings from our emotions that we are off, or that we need a more spiritual foundation to feel fulfilled.