I've only played on this rev since May, so I don't have much to comment on a lot of these, but I'll put in two cents!
The Overworld Map
I think I personally would prefer a slightly smaller map size.
I notice people this rev seem to have claimed / fenced off huge swaths of land that they'll never fill up. I don't mind it too much since the map is big enough, but it might be worth mentioning to people to dissuade it.
I wish there was a tad more ocean biome this rev.
Custom Drops from Ore (Fossils and Rares)
I liked the archaeology theme and the custom drops! And I felt they were at a good frequency. (Then again, I've only played a few weeks, and maybe that's not enough time to get sick of them.)
Events
I love all the events! I think you do a good job of having a nice variety.