The only changes I make is when, say, Sanz plays up front and I change from the striker being a target man to an advanced forward as it is his natural role in that position - thats about it! (Alfredo, Llorente and Garcia are all target men but if I had a poacher I would play that role etc)
I dont do any touchline shouts and I never make formation changes unless a man gets sent off (usually I take away a CM unless to cover unless it is my AMC that gets sent off)
As for team talks I quite often say show me what you can do and if we are level at half time I get all angry and demand a win and that usually works but at the start it was much more difficult as the relationship with my players was non-existant and now I am a favourite person to them all
Good luck!!