This is a very addicting game, and I hope it remains that way; however I have a few complaints that I understand are deeply affecting the game-play, thus reducing the interest on the game from not only me, but many other players.
1) This is a critical point, if not the most critical, of the game. Whenever you are winning too much in a row, or you have a relatively high "winning percentage", or even when you have too much "bucks", it seems like the game does whatever it can to make you lose. It makes your keeper unable to defend even the most ridiculous shoots that in other matches it would defend. It makes some of your players "act dumb". It seems like some of your players' speed and tackle skill are reduced dramatically, among many other things. I understand that the game wants to keep every player interested in the game, but by doing this, it is actually losing the interest of MANY players. Please, just keep it fair at all times for all players regardless their level, bucks, and players; On the basis of meritocracy.
2) Although this was already pointed out on the previous point, I think it is important to give another section to this issue. The Keeper... I can't understand how it operates. It might have to do to what I described last section, but it is unbelievable what happens sometimes. Some matches it can catch any and every shoot, however, in other matches it allows, pretty much, any shoot go through him... It is ridiculous.
3) After the most recent updates, it became pointless to dribble, or to have a player with high dribbling skills. Now it is almost impossible to dribble as you used to. Even your fastest player now can't run more than a regular defender, or dribble ANY player.
4) Any tackle now is a foul/penalty. It is stunting how many of the tackles result in a foul/penalty now. Some tackles were CLEARLY on the ball, and touched the ball first, but the foul is called anyway.
4) Finally, just a simple suggestion to make the make more entertaining not affecting the game-play (which, after the most recent updates, gotta be reviewed) is the option to change the jersey number of any player in your squad. It such a simple thing to do, and it doesn't affect anything; it just adds entertainment to the game. It is awful to have a player with a jersey numbered 33 and not to be able to change/fix it.
Anyway, I hope my points are taken into consideration as they are more like tips to improve the game than only complaints.