Sorry Panzer.
Anyway, my take on roles and stuff:
1) Less Villagers - I'd agree to 1-2 less villagers at this size, as I'd rather there be more for each individual player to do. In this game, there were two players who got stuck with nothing, and the one goodie who could do something wasn't believed by the information-less. If there's more special roles, there's more chaos.
2) More Players - AFAIK, One Night Ultimate Werewolf has no player cap, beyond running out of roles to provide. We could probably up the number of players to 7-8 max, and have room for those extra special roles without discarding the villagers, even. It'd be up to the individual GM of each game (I could GM, since I own this irl) to decide how many they'd want to do this with.
3) Time - At the very least, the day phase should be two days, I agree. There's so much information that's needed to be passed around in such a short time that everyone needs to be able to be around to get it and process it.
Ultimately (hah), I had fun, and would want to do this again, I think. Certainly a much shorter time commitment per game, and could probably draw in a few players who normally don't have time for a full game, but could make room for a few days for a bit of werewolf intrigue.