Why duality is actually sort of awkward

[Olimpia]

The use of the Demonstrative is not a problem in Duality (or in Mirage for that matter).
On the contrary, it is probably one of those aspects that make Mirage one of the best outer-Quadra relations.

Why? Because your Dual or Mirage partner is competent in the area of your greatest weakness, and will typically just take care of the issues deriving from it, without trying to "teach" you about it.
It is like having to lift a heavy load of bricks. You are struggling. Your Dual (or Mirage partner) would simply put the bricks on their own shoulders without a word, and you'd be relieved.
Whereas someone who has your PoLR as their first function, aka your Conflictor and Supervisor, will likely at first reprimand you for carrying the bricks incorrectly; and then when they carry them eventually for you, they will keep teaching you about how to carry them correctly, which drives you more or less nuts.

When it comes to your PoLR, it is actually more worrying and "awkward" when your partner is Ignoring it, like in Activity or with your Beneficiary.
Because, you still have the problems with your PoLR, but the other person won't acknowledge them as readily.
With the bricks analogy, it would be like your partner not noticing at first you are carrying those bricks, so you will carry them for longer than you'd like.
But once they decide to help you, it is usually more or less satisfying.

Your Mirror partner having your PoLR as their Role is also more "awkward", because they will be one of those people who notice the bricks faster, but not be able to help you that well with them.
It is more like they will take about half of your bricks on their shoulders somewhat begrudgingly, which is better than nothing, but still not ideal.

With someone who is your Identical, you both see each other carrying the same heavy bricks, and can sympathize with the other's pain.
You will trod along together, both carrying your loads and not being able to help, but it is a bit better being around someone who understands, at least.

Someone who has your PoLR as their HA, aka your Semi-Dual, will be eager to carry more of those bricks themselves, and talk with you about how they like doing it, and this will perplex you, or annoy you somewhat. Like your Mirror partner, they won't be able to really help you that much, and how they deal with it will be a bit more perplexing or annoying to you than if your Mirror handled the bricks.

Regarding the Mobilizing function, I don't see how "overusing" it would turn off your Dual.
As far as I have observed/experienced it, using the Mobilizing function a lot usually attracts people who have the specific IE as their Leading function, or at least in their Ego.

Regarding the Role function, using it too much can turn off your Dual, that is true. And, it might attract your Extinguishment partner to you.
I've found that the main attraction factor in Extinguishment is the Role function.