apologies if this has been discussed in the past but I wanted to try and give some ideas for future editions for a part of the game that's been neglected - set pieces
The current concepts of having up to 3 saved "routines" is outdated and doesn't allow you to adapt in any kind of real time to what's happening in front of you, it also doesn't allow you to easily adapt to game specific situations - i.e dragging everyone back for any set piece late on or ensuring everyone gets forward if you need to push it late in a game.
The whole concept of the options available needs to be replaced or updated. Things like adding an option for different types of delivery - driven, flat, drifted, high/low balls would add more variety, alongside different types of runs from your attacking players - peel off to the back post, make a decoy run, looks to block someone off to set one of your teammates free, show short to drag someone out of position.
similarly with defending set pieces, rather than just man mark small/tall, having a brief overview of some responsibilities going into a game is needed. Similar to opposition instructions, you should be able to select someone to mark the most obvious threat, designate the person to match the short corner run.
When it comes to the "stay back if needed" instruction, you should be able to say what "needed means" you could set that to always needing one more player back than they leave forward - if they leave 3 up then a 4th can be instructed to stay back with them, you could then be allowed to tell them what attacking position to take up if they are not needed at the back. Possibly the addition of an in game shout to tell a player to go back or forward when you see something in the build up to a set piece being taken would be good - it happens in real life and can prevent an overload if you're quick enough.
Then there's the chance to revamp the whole coach/analyst feedback when it comes to set pieces in training and match preparation. IRL analysts look for ways to exploit the opposition and set pieces are a huge part of this. You could set this to tie in with the analysts attributes, but you could get feedback ahead of a game saying we could exploit x for set pieces ( or they might exploit this) and then recommendations on how to react to that, they could suggest you need to set aside more training time and what to work on to get the most of it.
Obviously a lot of that will come down to your players and the ability of the coaches, but then feedback from the training could tie in with this too. things like saying the set piece taker is killing us with poor delivery so replace them or put them on a training plan, maybe your players aren't brave enough to carry out the set piece instructions you require or feedback that certain players are doing a certain duty well in set piece training so you should switch the instructions up for the game.
There was a post split CM that featured a set piece demonstrator or testing thing for training, that might be a bit much but training feedback could help, even things like you instruct they play it to the near post but you are overloading the back post so you need to change it.
Another good option would be to have a bit more realism in player choices or even have the option for a fourth routine when it comes to seeing a game out. it's too common to see you stick to a corner routine where you put 7/8/9 forward in the later parts of the game when defending a lead. the opposition will leave 3 or 4 forward and it's a total mismatch at both ends, it wouldn't happen IRL and it takes a lot of clicking and editing instructions to fix it - touchline set piece shouts, a fourth option or again going back to the "stay back if needed" instruction could help to counter this.
There's so much more can be done with set pieces and it could make a huge difference to the game experience.