I personally, because of the pandemic, only one organizing country should be chosen. This would avoid major problems if the cases rise too much in a country and there are too many restrictions.
In various countries, only if it were, each group in one country and then the phase to be eliminated in another country.
I think about the same, and I am not even against cancelling the euro and world cups for these ones, and postponing until the next one, have like 2024 euro cup and 2026 world cup, at which point we are going to be basically as covid free as possible (not like we will be ever free, but better at least) and we can "probably" have cups with fans on the stands as well by that time, we are talking about nearly 3 to 5 years away so I assume fans on the stands could be a real thing by that point if these vaccinations actually work.
I understand that people want to watch these, and I understand some people make profit from these, but if we give up from our entertainment and not like players make money neither so they will be happy about it, that means only one losing here is Uefa for not making a profit, that would be not a big deal for 99.99999999% of the population since there are only few people who make money in this situation.