These are leagues that require each team/owner to have a full selection of plays (40 offense and 30 defense) ACTIVE. No play used more than 5-6 times per game, which requires offense and defense settings to be evenly set. Rosters are required to be RL-related, RBs at RB, LB at LB, etc, as opposed to using CB and WR for speed gain. Its a different challenge, and one that is more related to RL football, here are the four leagues if you are interested....
1. FCS League, the original full play selection and diversity league ...
https://fcs.myfootballnow.com/2. DFL ......
https://dfl.myfootballnow.com/3. NCAA .....
https://dfl.myfootballnow.com/4. Elite ....
https://theefl.myfootballnow.com/Have a looksee, check out the league forums, they are active. All leagues have few or no open teams at this time. Pretty good indication of the continued ownership and preference.