In the first game, if you really wanted to, you could just stay in the security room until time ran out.

OMG that never dawned on me.
Don't you still have to do the big antidote round-up if you stay in the Security Room?
The core gameplay is great. The missions are terrible, though. I hope they're a little more creative with the sequel. Escort missions always suck.
What missions? Seriously, other than escorting people and fighting psychos, I don't remember anything other than those two types, except the big antidote round-up.
As for escort missions sucking, I just mashed the "follow me" button like crazy, and they tended to stay near enough. Actually, I'd call them "follow me" missions, because to me missions are a maddening combination of defend mission while it moves through its own path through the gameworld. In most cases this means there's no ability to use the environment to your advantage unless, because its always changing and only the escort target can dictate where it goes. In Dead Rising, the escort targets (mostly) follow you, so you can pick a path less choked with zombie flesh.
Is it really that good? I haven't touched it in months.
Stopped playing after the hot biker chick was pwning me with her bike. Annoying boss and the camera is horrible. Meh.
That bike's a pain, but using the construction framework there you can mess with her back and not let her near you. I tend to take the BFG from the convicts' jeep into that fight, at which point it becomes "Come to daddy."