Building up scenes for certain regions is a good idea on paper, but this is all theoretical. Teams in these minor regions arent going to improve at a rate higher than those with good competition, they will not be able to catch up in this format. Language barrier excuse doesnt apply, as you dont need to be able to talk to your opponents? You can play with italians, just against actual competition. Do you think teams are going to pick up players who are stomping against unproven talent? Scouting rarely happens and everything is normally achievement based.
I come from rocket league, and a minor region of saudi arabia and the middle east has been developed into an actual contender vs eu and na. They were awful for so many years, just playing against other middle east teams, then they started getting invited to play in european event with all the other EU teams, actual real competition against teams better than them. Now the top ME team is a very strong side, and the region as a whole is pushing out talent after talent. None of these players would have had any recognition or opportunity if they hadnt played against teams outside of their region. They would have stayed at the same level, never getting to play against actual pro level teams asides from scrims.
Splitting everything up doesnt inspire growth as there is no challenge, and nothing to prove. Players like tomaszy who are stomping their regional league, may never get a chance to join a well established team, as he cant join any team outside of portugal unless theyre in ascension or franchised. And at that point would you take the gamble and sign someone like that who has no experience? It makes no sense for orgs to gamble like that, it could be that the Portugal region is so weak that him stomping means literally nothing.