NBA 2K17: 8 Most Frustrating Things In MyGM
4. No Sign-And-Trade
This would really help with number 7 - Managing the Salary Cap.
You have a good player, but have your sights set on a better one. He admits that he would gladly sign with your team, but you don't have the money to get him. What do they do in the real NBA? Sign and trade.
The player's former team signs him and immediately trades him to you for the good player that you have. This is a win-win situation, as his original team is not left empty-handed and you get the player that you wanted.
There are times when it would be quite useful, especially when wanting to make the leap from good to great.