I see the appeal for nomination, it does give a player a chance to make their case, and as long as there aren't several nominations in one day phase, it shouldn't take that much longer. That said, a single round could be as long as a week, 72 hours for nomination, 48 for deciding on a single player, and 48 for night seems like a fair ammount of time. I'd go for that over other rulesets only if that's the pace you want to set for each round.
How does deciding guilt work? Is it guilty if there's more guilty than innocent votes, attains don't count either way? Or is it bases on a percentage of total votes?