Have been playing a lot of Athletic Bilbao saves, I would like to see more Basque based teams generate more players from diverse backgrounds, rather than just pure Spanish / French.
Whilst relatively rare, but not uncommon enough and it would closer reflect reality than currently modelled.
Current Bilbao players past and present with diverse backgrounds:
Past - Yanis Rahmani, Jonas Ramalho, Youssouf Diarra, Cristian Ganea, Ander Egiluz, Chris Atangana
Current - Inaki & Nico Williams, Eneko Clemente, Ewan Urain, David Osipov, Quicala Bari, Malcom Ares, Junior Bita
Also would love to see a larger pool of given names and surnames - as you see a lot of the same surname running around (I have at least 3 Diez's in my team, 5 Bilbaos)