Escorting survivors is annoying as fuck...but it's the goddamn gameplay and challenge.
Like, DR was challenging because there was annoying frustrating shit that was pressuring you. But at the end of the day the pressure is what made the game intense and rewarding when you accomplish things.
Also the timer has been so lax since DR1, I don't really understand how people ever had problems doing all the stuff they wanted. As long as you're constantly moving and not wasting time just dicking around smashing zombies, you've got time for pretty much ever quest/main story in one playthrough and it keeps a good pace so there's one thing after another without much dead time.
The worst part of Dead Rising is killing zombies because the combat is so shallow. Sounds like DR4 is getting rid of everything and just a "go kill zombies in a city" simulator, which sounds like it'll get boring after about an hour.