1: move the objective marker on the other end of the screen from the timer.
I can't see the timer because the mission marker is in the way. using suggestion 1 will solve this problem.

2: as for the missions and timer, possibly remove the timer from all missions, except for the wait for the police mission. it doesn't make sense for people to suddenly drop dead because they didn't find the jerry cans in time.

3: possibly include hidden objects scattered around the maps that can be used to deter the killer, but are only one use. because some victims are slower than the killer, and, with the exception of the police woman, are defenceless. Whilst hiding is a viable option for a while, there is an ability the killer has that generates an aura around a victim. and if you're the last one,
and you cannot outrun the killer, you don't have much options for living.

those are my suggestions for the gamemode, I may have more later.