I actually think it will do the opposite. Our broadcaster and the same EBU were really ingenuous to think Eurovision fans wanted to see innovation. Eurovision fans want to see things work. I honestly want things to work on Eurovision too. If they had put a simple led wall there instead of that damned sun, they would have been fine by now and nobody would have complained. Maybe someone would have found it simple, uninteresting, not the best staging ever, but surely not a mess of these proportions.
So next year, wherever the contest will take place, we will certainly return to more simple stage designes that will actually work well for Eurovision and surely no other broadcaster will risk that much: nobody wants to be remembered as the "new RAI". Our stage this year works well, but not for Eurovision. That's it.
In reality, the pulsating philosophies of the Eurovision Song Contest are exaggeration and innovation. Eurofans are always very humorous, impatient and greedy for news. This year, once the Covid 19 pandemic has been overcome, Rai and EBU have opted for something big (even if a worm, the unexpected, can hide inside the most beautiful apple).
I do not think your considerations are wrong but a point from which to start in order not to take the longest step of the leg. Your vision is pragmatic, minimalist and conservative. However, I love the avant-garde, the experimentation and the courage. If we humans have been able to accomplish great deeds it is thanks to the ardent desire to make dreams come true. If the two of us had lived in Ancient Greece you would have agreed that Icarus did not have to fly and challenge his limits while I would have thought that it is better to overcome our limits than to live a flat life and that it does not matter if you fall, what matters is to plant a seed (this allowed us to get to the moon).
I do not see a disaster for the stage or the future fear of other nations of being the "new Rai". Indeed, other nations are following the situation with interest (and trust me, they envy our choice and our courage). I think that in the next few years we will see a revolution in stage building (as we have seen the same revolution in the revival of national languages and less industrial songs). Having said that, Francesca Montinaro's stage, whose sun is suggestive, remaining still can easily perform the staging that we see every year. No more and no less than we might witness, according to your respectable words.