The etudes are really easy for tuba this year (for me)
I think the real challenge for players will be seeing if they can put etude 2 (the slow one) interesting and engaging enough for judges.
Etude 3 con moto has to be at least above 80, and the sixteenth notes should be double tongued. (don't forget the valkyrian 8th!)
Etude 1 has to have all those weird partials that switch from D minor to F major and to some sharp keys all right down to scratch. And the dynamics should be spot on.
I really wish there were more tuba videos though for the etudes.