As I said, I'm really not against a Kazakh debut and of course, if they decide to join, I'd like to hear what they have to offer. Plus I love their flag.
As Russia, Georgia and Azerbaijan seem to shamelessly import songs from somewhere else (and not always for the better..) and as Kazakhstan isn't that far from them, I guess they could also "play safe" music-wise, which is not what I want. In that case, there is no point in joining imo.
To me, priority must be given to countries like Slovakia and Czech Republic. The more, the merrier of course, but before extending the European map, the EBU should look more closely if there isn't a hole in Central Europe.