It may have taken Mihajlovic a while, but he's getting close to a settled line-up and a team with some sort of identity.
That gives them a chance to really start to build something and to start planning longer term as to how to go about strengthening what they've got.
Milan have been a complete mess with neitehr the stuff on the pitch or the transfer strategy giving them a lot to work with in recent years.
There should now be more pressure on Galliani as Mihajlovic has given him a clear idea of what his team will look like and therefore the type of players he needs.
Inter are in a very dangerous situation right now because Mancini never managed to achieve those things even when Inter were getting results.
Now that results are going against them and confidence will not be high, it may become apparent how little by way of a solid structure he has actually given Inter.