Let me preface this post by saying that I do enjoy the game and these are things I would love to see but don't need in the game.
The two things I would love to see in the next update are 1) a new attribute that calculates a person's ability to do things not typically seen in the box score (which I know is a pipe dream) and 2) more control over my team's defense (which I don't think would be too hard to add). For the first addition, I think that adding a non-box score related attribute would make role players and the play-by-play more interesting. I believe this would also make team-building and lineup setting more interesting. While I don't have a specific idea on what this attribute could cover, I do believe that an attribute can be created that could correlate to actions such as screen-setting, ability to rally the team in a comeback or inspire his team to practice/workout harder (basically making his teammates achieve a higher possible rating than the color scheme or WE makes possible). Using the screen-setting as an example, I think this could make role players more interesting because you could pair a player with little-to-no ability to score but high screen-setting with a guy with poor BH but high PE. Therefore, the pair overall would result in far more points than if they were separate. This would also make the shot-allocation points more interesting because if the role player has zero to none, then he is more likely to play off the ball, therefore he is more likely to set screens.
As for my second wish, I would love to be able to have more control in setting my defense in games. If I remember correctly, I believe NBA on this site has the ability to set up defensive matchups in game. I believe it wouldn't be too hard to make that a reality on this game as well. I would love the ability to move a strong guard defender onto the high-scoring guard of my opponent and potentially disrupt my opponent's offense. I think having this simple feature could create mind games between two evenly matched opponents. Take this scenario for example, imagine player 1 has an elite scoring SG and a poor scoring PG. Player 2 has his PG as an elite defender but he is also the primary scorer for player 2. There could be two levels of thought that would go into each player's decisions for matchup setting. The first level is relatively simple, Player 2 must decide if his PG should defend Player 1's SG in order to put his best defender on Player 1's best player. Now Player 1 could counter this by making his SG to a PG which would result in Player 2's elite defender not being on the best player. Therefore, this is the first potential mindgame/decision. As for the second level of mindgames, this is more complicated. As stated before, Player 2's PG is an elite defender AND primary scorer for player 2. If Player 2 makes his PG defend Player 1's best scorer, it could result in his PG getting tired more quickly, therefore he wouldn't be able to score as efficiently. This issue creates the second mindgame of how big of a factor of fatiguing Player 2's PG is. Maybe Player 2 realizes this issue and keeps his PG a PG. Player 1 could discover this and may switch his guards to expose this weakness. Overall, I believe adding an ability to control matchups (at the very least) could add an interesting layer to the game. Currently, the game feels like there isn't a whole lot that can be done to control your defense. Adding more features would make that side of the ball more compelling.
Overall I do enjoy the game. I believe that both of these wishes could add an interesting layer to the game I already enjoy. While I think that both of these ideas are more of a pipe dream than a possibility, I still have hope that something along these lines could be added.