Don't worry mate. Your fans will come around. I had the same problem when I first started bringing overseas players in. And if you have done it like you have done and made multiple transfers in a very short amount of time then the attendance and merch will take a hit as this affects the "familiarity with star players and not afraid they will be transferred" section in the fan survey which is where the merchandise and attendance shortage is coming from. Eventually they will get to know the players if you keep them long enough and this problem will go away. Take my team for example. More than half the team overseas players but getting record numbers for my franchise in terms of attendance and merchandise as I have had the same group for a while and yes winning and playing in a higher division helps. You'll be right..... Just gotta be patient.