From what I understand, non-leaders seeing households they home teach has been submitted for approval by the developers and is likely to be implemented in a future version of the LDS Tools mobile app. However, non-leaders probably won't be given any access to Leader and Clerk Resources to see anything, and the LDS.org Directory hasn't had any significant updates for a while, so this may be an LDS Tools-only feature at first.
Distributing home teaching assignments with a personal invitation, whether by handing the person a piece of paper or sending them an email, gives the quorum/group leaders an opportunity to meet with the home teacher about any needs of the family they're being assigned, and it gives the potential home teacher an opportunity to accept or refuse the assignment, which leads to stronger commitment and efficiency by not having to continually follow up with those who don't want to be home teachers.
Samuel Bradshaw • If you desire to serve God, you are called to the work.