I've noticed something during my time playing this game (not 100% of the times of course). Every time a substitution is made by me or the opponent there is a higher chance of something happening, usually a goal or a card. I was playing the cup final just minutes ago. Second time started, match was 1-1. I decided to remove my RM who despite playing really well I wanted to use another RM with similar stats who scored more goals this season. Right after my substitution happens the opponent scores (Yes I lost the final 1-2). Am I crazy or has someone else noticed a similar thing. Maybe its because the team balance is affected until the new player gets in the mood of the game (I guess this is too realistic to happen in TE).
Oh and since I am a stats freak especially for player appearances. I noticed if the player plays less than 20 minutes (gets injured, gets a red car or enters in the match after the 70th minute) his appearance won't be counted.