None of them are useless, but Llorente obviously does a great impression of it at times :-)
Sort of agree with your comments on Poch's tactical setup especially with the full-backs. Whilst Poch could have the best tactical setup in the world, he can't compensate for the kind of mistake Trips made on Monday though. No manager could.
Not sure Trips has had one great game for Spurs this season, and with his current form it wouldn't be unfair of Poch to use one of the other right backs. I'm also still curious as to whether Aurier can make this transition. He has more raw attributes than Trips, but needs to cut out the mistakes. Even in Italy, he was our MoM but still lost his man from the corner for their goal.