just finished survey, and though to put it here too.
timer is very annoying, and you can’t really be distracted by wife and/or kids because of it. RL don’t mix too well with this activity. Even it puny F1-F2 , with ubertanked ship - you are dead. This have a very noticable chilling effect. (Yeah , I once left World Collide running to go and do shopping , while sitting in Marauder 
)
its best to either remove it or make it so you pushed out of pocket when its runsout, w/o any goodies. Make 1 last crate at the final exit gate. And put all good stuff in it. So either you reach it and take it , or timer runs out and you pushed out, OR you are overwhelmed by rats and killed anyway 