There are no '3 options' for the bulgarian players. The options are: make your own team (whether bulgaria or balkan idc) or don't play . If you can't put in the effort to look for players then you don't deserve to play.
This dumb bullshit about letting more players play is the most retarded argument I've ever seen. You're not allowing more people to play, those bulgarians are replacing your ukrainian players because you think they're better. As you said, you have 10 signups, so you could make the roster limit if needed. All muha and artista would be doing is replacing your native players, not adding to them.
It's honestly embarrassing that you're putting this decision in the hands of the bulgarian players themselves. Let the captains have a vote on this or fix this shit yourself. Otherwise this tournament will immediately be stained by bullshit like the NC was with your CIS + CZSK + whoever else lives east of Berlin coalition.