Male members of the church joke about how one day polygamy will return, how they’l have more than one wife yada yada yada. Although the main body of the LDS Church refrains from actively teaching the doctrine of polygamy it is implied that it will one day return into church practice.
The United order was another doctrine the church no longer practices. It is a socialist order where everyone contributes to the whole then the church distributes based on individual need. It is freaky how the church organization itself is set up like a shadow government, and runs with the fluidity of a major corporation(which it is).
The best part is bringing these subjects up to a Mormon Bishop or Stake President or any of the High Ranking officials and see them try to side step the fact that here are two expressed comandments revealed to their prophets by God, yet they choose not to follow.