What it would take, for me personally you mean?
Think it would depend on the situation, who he's facing, which type of climb, which race etc. Overall i'd say if he were dropped and lost considerable time, that would be a big disappointment tbh. We know he doesn't have a punch like the Slovenians, so getting dropped somewhere in the final 500 meters and losing 10s i wouldn't call that disappointing. If he gets dropped early, but doesn't lose extra time after the initial drop, would also not be much of an issue for me. On the other hand, i would also be disappointed if he couldn't drop non-top climbers (say guys like Bouwman, Konrad, Elissonde...) on a long climb, assuming that would be intended.
I think we can all agree his candle was dying halfway the Giro, and so it might be easy to forget, that he was still with the "main" group on Zoncolan until Benal's attack around the final 1k (i think), and well ahead of guys like Valter and Foss. He lost 18s on Vlasov, 28s on Bardet... Considering the circumstances, imho that was an encouraging effort, even though people were too busy mocking him for it. It was his first GT, after 2 weeks, his age, his injury, his recovery, preparation and dwindling form taken into account, that was already an indication imho.
What would it take before he confirmed or even impressed, Netserk?