While the QB play leaves a lot to be desired, I enjoyed the couple of games that I watched. It's not the NFL, but it's football.
Things I like:
Challenges - every review is initiated from the booth and although only certain plays are technically "challengable," they will overturn calls that are blatantly wrong. (Usually.)
The kickoff rule discourages touchbacks while reducing the likelihood of injuries during the return.
The OT "shootout" rule.
Listening in on the radio calls from the coaches to players. Tthere must be a significant delay to avoid letting the other team know what the play call is.
Listening to officials' discussions, including the replay booth.
The timing rules after the 2-minute warning make it less likely that a team can just take a knee three times to kill the clock.
The point-after TD. I kinda like the thought of a three-point conversion. This, combined with the timing changes after the 2MW, could make more games exciting until the end.
Things I don't like:
In-game player and coach interviews. "Hey, you just fumbled the ball away - what happened?" "Coach, why did you decide to punt instead of going for it?" Come on - let them do their jobs during the game, and save the interviews for later.
Things I'm undecided about:
The punt rule discourages pinning a team back by punting to the corner. I'll wait to see how that plays out in various scenarios before deciding whether I like that.
One foot in bounds vs two feet to make a catch.
The coach-to-player radio not cutting out when the play clock hits 0:15. I suppose if they want this to be a developmental league, then I can see the value of having that support available while players learn to read the opponents' formations.