Well, few things got to my notes while playing.
* More tactic slots
This is really needed to allow us facing many different formations, like in Seriea A where almost every team have different formation. And by coaching your players few more comes helpful when facing those various formations. At least five slots wood be really nice.
* More places in formation lines
So we can play with 6 players in the midfield or defense. That comes useful when you want to save result or got a red card. But more important, that give us more creative options in tactics making. For example, I want to play 4-4-2 but with 4 central midfielders, not 2 central and 2 wide. that gives space for wing backs to act on the flanks without canceling each other with wide midfielders. Just give us more rile life options for creating tactics. There is no such a restrictions in real life like we have now in FM tactic board.
* More precise player instructions
PI with a few more options but I primarily mean on combining PI and OI so we can instruct, for example, wing backs to close down just wide opposite players and not attacking midfielders or attackers, or central midfielder to close down just one opposite central midfielder and wide midfielder when in possession. This is also restriction in FM which doesn't exist in real life and is very useful.
* Improve AI
One thing is repeated every year, all of us can easily dominate Europe for eternity after few years (and that depending which team we play with). I want to see other clubs making wiser decisions, making squads strongers and more competitive. I want to see other managers more adoptive to opponents tactics when needed, it's not so interesting when we win Premiership with mediocre Swansea, Newcastle or Everton in first season, in third Champions League and then forever delivering every possible title every year. Things like that doesn't happened in real life.