Re Denmark, I guess depends on how good you think they are as a team? If you use the Euros as a barometer then it's only fair to also use the Euro qualifiers? And also compare to pre Rasmus for some comparison?
22 World cup they finished last in their group and scored one goal from a corner.
Euro qualifiers he comes into the senior team and does well (7 G, 1 A in 8 games)
I get he was probably disappointed re his Euros showing but he was what 20 or 21? Was he actually that bad or were Germany just too much for Denmark? They seem to have done as everyone predicted, go through 2nd and then go out in the first KO round.
Think of someone like Lewa who played for a weaker national team - he only really became 1st choice for euro '12 (3 years older than Rasmus). In 2016 they played N Ireland, Ukraine, Germany in their group and he scored 0 goals with 0 assists but no one ever thought that reflected on his ability. He blanked world cup 2018 (senegal, columbia, japan) as well and this is at his peak, not when he's 21. In the same way as if Rasmus had won the golden boot at the euros, it would simply not interest me, the only thing that we should judge is how he performs in a United shirt and, as you say, the worry is the goal return. Even with mitigating factors.