The problem IMHO is that it doesn't matter how good is the team and how well organized they are at SI, however it is almost impossible to make a polished game with real innovative new functionalities in one year.
It would make much more sense to have an iteration every 4-5 years with in between DB updates, competition rules updates and bug fix.
1) it would make the game playable at full potential in September when we are all excited by the start of new football season IRL and when in Europe, North America a Far East (the locations with more costumers) is starting the autumn, so are starting the months when people are more keen to stay home and playing games;
2) aficionados would still buy the update every year and paying almost full price, because it's important to have updated db and competitions, new potential customers could be attracted by offers game+update, as it happens with DLCs for other videogames
3) in 4-5 years the developers would have the time to implement properly great features and to improve enormously ME and AI, it would make the game better