Yeah, from an organizational view, mass start simplifies things a lot. And it helps achieve that race feel for those looking to compete.
An observation from a score-O that I was at recently... I finished the race thinking that the course-setter had set it up somewhat wrong, because "everyone" went the same way rather than scattering. (Ok, not everyone, but pretty much everyone who took off running from the start.) In this event points for each control were equal to the control number, and the higher numbers went roughly in sequence around the map, with lower numbers in the area closer to the start/finish.
So the somewhat obvious points-maximizing strategy, if you weren't certain you would be able to just get them all, was to start with the high number control, proceed in descending order around the map until you're almost out of time, and then high-tail it back to the finish.
I initially viewed this as a "wrong" way to set up a score-O. But then after reading your comment about mass starts and some logs from your participants, I'm thinking this is yet another clever method of designing a mass-start that a) simplifies life for the organizers, and b) funnels runners together, a la relays, Billygoat, etc, to create a more competitive feeling race experience. The funny thing is it didn't sound like it was done with this intention in mind.