I've recently came to the realization people are much like magpies. They can't help themselves when they see shiny things.
If your map looks good and plays decently, people will be all over it like a fat man over pancakes. Conversely, if your map plays pretty good, but only looks decently, it's generally a gamble (or matter of "social status") whether or not people are going to give your map a second look.
See, while people complain a lot about "map sizes!!!1OMG!", truth is nobody cares. They complain because they see the number, not because of how long it takes to download. "100?!? OMG!". See, as stated several times before, unless you're running your game from an old toaster plugged to a dial up modem with a rusty copper wire, it doesn't particularly matter if your map is 30, 50 or 100 mbs. The time it takes nowadays to download files that large is laughable. Shmitz's Meridian was criticized for having 80 mbs! OMG! It takes me around 1 minute at most to download. And that's being generous.
Off course, you do have to justify your map's size though. Waiting, even if it's only an extra 20 seconds, to download a map that's completely dev textured isn't very amusing... Specially considering that if your map is that big now, imagine once it's done...
The difference between 50 and 80 mbs might not be much, but 200 for a perfectly average map is a bit of a stretch...