Personally,
Get a Team Balkans in there again for the smaller nations such as Bulgaria, Serbia, Macedonia, Croatia etc etc.
Ukraine has enough members for 1 team.
Russia as well.
Slovakia / Czech should be separated. They both have enough for 2 teams.
Sweden have enough for a team.
Team GB should just be merged back again, tho there probably is enough for a Team Wales, Scotland there isn't really. Ireland will just be formed up fake Irish people again.