^^ There is this and there is the fact that he and Timmy don't know what to do together. Timmy always sets the high screen on the PnR, but thats Tiagos bread and butter. So Tiago just kind of wanders down to the basket and hangs out a little to the right of it, which clogs the paint if his defender plays him inside (which they are doing).
Put Duncan down there and out a few more feet and his person would have to hedge. If Tiago streaks to the basket after the pick and he goes to help the guard can pass to Duncan who will have an open 10-12 footer. If the help stays on Duncan Tiago has a good chance of an open layup. If Tiago stays and Duncan stays the paint is empty of bigs allowing the slashing guard to come down and get a layup, which if the help comes and leaves Tiago or Tim one of them is open for a mid range jumper. Or Tiago can stay put on the high screen and Tim can position himself inside he has a clear look and can move to the basket for a dunk/layup.
Plenty of options but Tiago is the young guy that can run, he needs to set the screen. Duncan needs to draw the other big away from the action and get his money bank shot ready. I predict we will see a lot of this style next year.