I don't think it's about being country enough. It's about being gimmicky enough and standing out. I don't see it in any of em yet.
Maybe Eurovision is starting to become more of a song contest and less of a freak show. Idk, I just don't see things like Party for Everybody or Dancing Lasha Tumbai almost winning ever again. That aside, the Portuguese and Icelandic songs are pretty weird and apparently predicted to end up in the top 10.