Serie A players are doing pretty well so far.
The best, I believe.
18 goals and 9 assists (27 G+A) from Serie A players for now. Bundesliga is second with 21 G+A (14+7), EPL is third with 18 (8+10). La Liga with barely 3 G+A (1+2) and Ligue 1 with 1 goal and 0 assists.
And the team with the most goals+assist so far is Juventus

Without counting the 2 own goals, of course. Juventus players have 5 goals and 1 assist for now. They mostly come from Ronaldo, but also Ramsey and Morata with a goal. Then follow Atalanta with 5 (2+3) and Inter 5 (4+1), while Dortmund 4 (3+1), Leipzig 4 (2+2), Liverpool 4 (2+2) and City 4 (2+2) are right behind.