Well, we are at a disadvantage with this. Then again, we have an advantage in quickly developing our teams, you have promoted to the first league, after your first full season. New teams in largest nations take calendar years to achieve that. also, we can tank money easily, which is key to winning B3, for example. See Venomous Scorpions and most likely San Felipe this year.
Also, I have left the number of players up for discussion. I suggested 5, that way, you would only need 2-3 national players to compete, even in B3, since teams usually use 7-8 players rotation. Maybe 6 or 7 would make it easier for the start?
Anyway, this is just a suggestion, we should try to evaluate the possible effects. I believe that they wouldn't be as harsh as it first may seem.