Hmm, really? Never mind cute, it was damn sexy, haha. Some options were quite useless (like most of the overlays), but others were very useful if you knew how to set them up clearly. crazyscot, I didn't use it for either of those things and found it useful for other things such as:
1) Having a clear overview of all unit positions during wars and such.
2) Finding unimproved tiles right away with the Improvements icon mode; sometimes I'd even spot a pillaged tile I've missed since the improvement icon turns red and you can't miss it in the strategic layer.
3) Planning settlements with Resource icon mode turned on, and the Resource overlay to color them by type (helps to clearly pinpoint the locations of strategic resource plots too), plus the grid enabled for proper spacing.
(It's also great when testing mods and getting a quick overview of your resource distribution.)
4) Clearly viewing all city connections and planning an efficient road network.
5) Getting a very clear picture of trade route paths.
6) Also, helps to get a slightly clearer picture to search for Antiquity sites, using the Resource icon mode. (If they would have added another color, like magenta, to color antiquity sites instead of lumping them in with green bonus resources, it would've been perfect.)
7) It was also nice for moving large groups of naval units quickly, to plan their destinations better and avoid traffic jams, especially since their movement rates are so high.
8) Like I said above, it was great for testing out map script mods and quickly analyzing different aspects of the map.
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Sure, none of it is necessary. But, as said, it was just a convenient tool to have to help view things more efficiently at times, especially at its top-down angle. Some even play under it exclusively, but I could never do that since I love all the eye candy -- I could never even disable combat animations like others do. I just jump into the strategic layer, get the info, and get back to the normal layer to continue playing.