Another question for you (sorry, I hope they are not too many): are you considering to add more achievements and / or trying to modify it a little?
Here is my reasoning: I am at the beginning of a new project. I bought several good players, but new projects take 2-3 real years to become competitive. I would like that one of the new players become a NT player, or trying to fight for a Cup or a League, etc. However, it takes a long time, and it is a competition, my players might get injured several weeks, other managers train better than I do, etc.
I suppose that there might more BB users in a similar position, and probably we want / need other challenges. In my opinion it would be nice if BB adds 10-15 new achievements to the list every real year, and you add a ranking of the best (for example) 200 managers (not only the first one) in achievements.
Maybe BB might some small rewards too for the best managers in achievements: since these managers know well the game, fans of the team would be happier and, .. for example, the 200 best in the list of achievements would have 1% extra of incomes in the shop, 2% extra if they are among the 50 TOP, 3% extra if they are among 10 TOP or something like that. Not too much, but still enough to start a competition