Thanks to the developer for this game! I wish you not to stop, improve the game and make us happy! I'd like to suggest a couple of ideas:
1) make a system of relations between countries (which can be configured before the start of the game and which could change over time of the game), which could partially affect the scores. So that there are some events that would affect the relationship (for example, a scandal between the participants of the countries)
2) the choice of the language in which the songs are sung and the country of origin of the artist (so that this also affects scores and relations with countries).
3) so that there is a third type of selection - this is when the jury and the viewers vote (+ plus, you can make sure that not only the viewers of this country vote, but also voting from all over the world)
4) To make the results more unpredictable (because now if we are talking about a higher high place in bookmakers' bets, then they are mostly wrong by 1 position)
5) redo the bookmakers (so that if the total rating of the two countries is plus or minus equal, then they should be equal to the betting rates, and now the first place in bookmakers always has a percentage of 20+%, and the second +- 13%, even if one country has a rating of 87.8 and the other 81.3)
6) so that the opinions of the audience and the jury do not coincide more often (it seems to me that the rating of the performance and the artists should influence the voices of the audience more, and the quality of the song would affect the votes of the jury more) and I think it is necessary to add a vocal indicator, which would also significantly influence the votes of the jury.
7) so that the state provides not only annual financing, but also bonus money for the place occupied by the country (the better the result, the more money)
I hope my ideas will be useful