I have noticed the sames strenghts than you but what is it a typical 4-3-3 for you ?

Is it this ? :

What do you think of 4-3-3 ?-433w.jpg

About weaknesses, I have 3 MC's also what is the problem and how correct the grip of midfield as you said ?

About 4-3W-3W, it's ok because opponnt has a numeric superioruty on flanks