Never been a map user. Obviously not for UK park as I know my way around anyway but when visiting new parks on the continent I like the idea of being a bit lost and finding some things I usually wouldn’t head to. It adds to the fun! But I do have a couple maps that I took for souvenirs. As far as galactica goes though, I can’t see it being much different, people know about it and the vast majority of the public know where it is too, it may get busier in the mornings and near closing as the entrance/exit is used.
It is sometimes nice to have a list of attractions too, so as you say can wander and get a bit lost finding things, but then later on make sure you didn't miss anything out!