I think that this is a good discussion to have and should be properly considered. There is many advantages to changing, but it would definitely throw around our meta a lot.
I think it is coincidental that the last two games finished early. My game ended early because the scum were a bit too powerful and reached majority with four of them alive, and there was a couple extra deaths that probably shouldn't have been there. There was also two back-to-back 24-48 hr hammers probably due to the split discussion threads, which cut the game length down significantly. In the case of quaking's game, it was basically the opposite. The town were very powerful and we got considerably lucky in lynching the scum consecutively and quickly. I think the scum also conceded early, all making the game abnormally short. That crazy fast hammer was another thing. Multiballs like yours are generally short with the increased amount of deaths. So I don't really think we're naturally having shorter games now; I think it's been either because of mechanics, balancing issues and hammers.
That said, I really like the idea of shortening WW games, but not by introducing lots of deaths. Instead, I would recommend shortening day length if we were to shorten WW games. This, however, is a huge change. At PB, we rely on the long 5-day Day 1 and Day 2 to get a lynch from RVS and to scumhunt with little available information respectively. I think it becomes a problem when we have long 5-day Days by Day 4 and afterwards when the alive players is far less, especially when the active players are dead. I would think that cutting day length would force scumhunting from large cases and large defenses to smaller cases. The threat is that if our meta does not adapt, the first player to get a case made on them will be guaranteed lynch, since we often will take two or so days to move from wagon to wagon, in the present meta.
However, I find that like the longer games on PB. I find that I like to join the short 1 to 2 week games of another forum while playing PB games, as it keeps me from going bored especially when dead on PB. Nevertheless, I agree that if we could reduce the commitment needed from players, things could go much smoother.