Here's a few of the things I would love if got implemented/improved.
- Better interaction, transfers, contract handling and private chat
Interaction with players outside your club that you might be interested in signing is very bad at the moment. Only being able to admire and declare interest by talking to a journalist isn't especially fun. Just take a look at how it is in reality - if a scout from your club is spotted watching a match the media will instantly start making assumptions and rumours. And if you, as the manager, view those games personally as well that should have some impact (magnitude reliant on your reputation as a manager etc. of course) on the players you're watching.
When it comes to transfers and bids, the first thing I would like is to actually receive a reply from the manager when we're negotiating. If I offer £20m for a player and they "negotiate" £30m... that ain't exactly negotiation. More dialogue pretty much. This goes both ways.
In contract handling I think it would be cool with having like a private chat besides the actual contract. Of course contracts would take a bit longer to work out but that's usually how it is. I'd love to say "are you out of your freaking mind?" to an agent if he demands a huge agent fee etc. and also be able to affect the player and maybe even turn the player a bit against his own agent so they can lower their demands. Being able to lock certain stuff and the "take it or leave it"-option added in FM12 was nice but more dialogue here as well would make it really interesting.
Private chat on the other hand just need more depth. More options and more reactions from players. Being able to give better feedback regarding match performance, transfers, training/development etc.
- Improved tactics and training
This is of course something that continues to improve as the series go on. But more options when creating training schedules, PPMs, individual focus and all that so you get a bit more control over your players' development.
As mentioned by others, tactics are pretty detailed now but still limited and I'd love more options without making it too advanced - it should still make sense. They should definitively add better tooltips to all options so that new players can understand what impact the changes they do have on the match itself. And yeah, as said, more options both for the whole team, defense, midfield and forwards, player roles etc. At the moment you can choose where you want players to cross from and where to aim and I'd like them to add more to that. If you set your wingers to cross aim on the near post, I want my forwards to move in and get in front/in between defenders on the near post. And if my fullbacks are crossing on the other hand, I'd like to get people into the box so that the fullback can cross aim at the far post - so that if I have a tall striker or maybe tall winger, they can move into that space. Pretty much adding options that are really relevant to each other. Stuff like this would also make crossing much better because at the moment it's pretty bad. Could compare it to setting up corners - that you actually can tell players to attack the near post etc. without it being overpowered or unrealisticly good of course.
- Regens and how they are created could need a big overhaul. First of all, their attributes need to be relevant to how the player is and realistic. How many haven't seen a regen that is 190 cm and 85 kg and has 9 in strength... really? The face generation and quality for regens also needs to be improved.
- They should also improve the whole "squad" section. Improve team reports, tactica analysis and all that so it's easier to spot things that ain't so easy to see during the game itself.
- Improve boardroom and everything that comes with it. Here I'm talking about everything. Improve the requests and interaction the manager has with the boardroom and even the staff itself. Better control over the economy. I'd like to see and "feel" the effect of having tours in different countries across the globe and more financial feedback. If I get a feeder club in USA I'd like to see how that affects the clubs economy and if I have a tour in Asia I'd like to get feedback when it comes to shirtsales and stuff like that.
If the chairman, directors etc. are very hands-on I'd also like them to make requests, come with advice etc. about tours, setting up academies, feeder clubs and stuff. Something that also would be cool was if chairmen sometimes interfered more in the managers business.
Being able to upgrade medicial facilities to help physios would also be great.
- More reaction from media and fans. Basically make press conferances better and definitively add more options. Having the opportunity to answer in a reluctant, assertive way etc. would also be nice. Media reaction is to add more pressure on the player and manager if they're doing poorly and the same from fans as well. If a player is performing badly or is constantly injured it would be nice if the voice of the fans reached the manager.
- And one of the last things I can think of (at this moment) is making the game a bit harder in the sense that a overpowered tactic shouldn't make you able to win everything with a bad team. You should without a doubt get a long way with a good tactic but to win Champions League 7 times in a row should really take a lot! We're talking about very good players, very high squad harmony and mentality etc. That should also be able to work the other way, to a certain degree. Think of RvP for Arsenal last season for example. That you can have a decent team but maybe one really good talent or experienced player that's able to lift the whole club a notch.