Mafia: general discussions.

Cop, what did you want to say?

I modestly kept silent to avoid apologizing publicly.)
Regarding clues, they aren't always needed in and of themselves. In games with clues, what matters is that the clues serve as a reason for discussion and activity. Even if none of the clues are solved, some information about the players will still emerge during the discussion. Accordingly, roles that don't leave clues can be scary precisely because of this: not because these roles cannot be identified, but because after their nighttime kill, people usually say, "Okay, there are no clues, there's nothing to discuss, I'm going to sleep."
Perhaps, if games without clues become the norm, the players' psychology will change in this regard. But that's not a certainty. And when will that happen? If it takes 5-10 games, the Mafia on HW simply won't last that long. Although, experimenting is probably a good idea. Making it the norm, I'm not so sure.
Something really needs to be done about the nights, I agree. In principle, the simplest option is to allow nighttime discussions. You just need to take this into account when balancing the game, giving the Mafia a little more power (since the Mafia will clearly lose out from nighttime discussions). In principle, if this is needed to keep the players engaged, why not?
And yes, Sesama's idea of a fixed time also appeals to me.