I have the same issue this season!
My 6* ST,1on1 scr, with my power training, who was the top scorer last 2 season, very hard to score a goal.
My MR, 5*, ckr, who was the top assist last 2 season, don't show up much this season.
My ML, 5*, fkr, too.
But they are still having at least 7 rating in e'match.
Though my team is struggling in both Cup & League.

I reinforced only my deffence with 2 NGE youths this season Coz I still believe my attackers just power trained them.

Something has changed this season!!!

PS: I also keep my player morale & condition suprb!