I still feel like the refs do too much, are too involved, if the number of flags is down it's not by enough, I want even less. you could fix a lot of the missed calls issues if you used the XFL replay review system, with an official watching the game and stopping play for 60 seconds or less if something is wrong, in effect every play is replay reviewed and you don't even notice, 60 seconds is enough, if it's not obvious enough to see in 60 seconds, with one or 2 angles then it's not worth worrying about. Replay should only be used for very obvious errors, if you need 10 angles and ultra slow motion and look at it for 5 minutes, it's not worth wasting time, just accept the call and move on. Also, in the XFL system, you get one challenge, but can challenge anything, so if you think you had obvious pass interference or holding or something, you can challenge for it, once, which is good, don't want it happening multiple times.