After time spent on the new 1v5 matches, and the additions of active imposters + listen, I feel a lot more of a struggle to have map pressure and kill bunnies compared to 1v4.
And to me I feel like the main problem is with imposters. Imposters are your only true way to have map pressure aside from just being in that area/actively chasing a bunny, so I'm not counting invisibility->teleport or using boxes in general as map pressure. It's way too difficult to try and keep all the bunnies occupied when they're progressing at the same time with Imposters on an enormous cooldown, frankly I NEVER have all 4 of my imposter slots used in the lobbies I go against, at least. They're always destroyed, intentionally tripped when I'm pinged on the other side of the carnival, or if it's an active and I'm in a chase it's used up fast. I feel like ideally, in any situation, magician should only have 1 slot available for imposters throughout a match, with your other 3 used on traps/actives.
You can use active imposters to counter a loop or to just try and end a chase faster (placing an active ahead of the bunny you're chasing), but now your strongest ability as magician is gone for 90 seconds. Active imposters only last 60 seconds, btw. At the very least, I think the actives should last as long as your cooldown for imposter takes to come back. However, I feel like this could be dangerously snowball-y with a lower cooldown for the classic trap imposters.
So my suggestion is this.
When you place a trap/playing dead imposter (infinite duration), your imposter ability is on a 90 second cooldown.
When you place an active imposter (60 second duration), your imposter ability is on a 60 second cooldown.
I think this could make the decision between using your imposter cooldown for an active or a trap a bit more fair for the time cost and sacrifice of the other option.
(... either that, or just lower the imposter ability's cooldown in general without any conditions. but i think that's a bit dangerous.)