EBU wanted countries to show their national heritage and language is a part of it. The orchestra was a sign of a genuine musical accompaniment, now you can insert anything you want to the playback, so the song will be better, than it really should be. Formal outfits were a sign of seriousness.
So it is your personal opinion which doesn't make it a fact. But the reality is that the contest was considered a kitsch fest in the 70s, 80s & 90s with the orchestra & language rule. Changing that back will not change the contest's reputation.