Things I'd like to see:
I like the natural terrain, but not so much extremity to it - maybe make some parts flatter
Or have like, a small mountain range on one side of the map, flatter terrain in the middle, and oceans on another side
(If need be I can draw a sketch of what I mean by this so you guys have a visual of what I mean for this ^ )
A separate world for PVE planning, Redstone, and build tests
You could have it so that the PVE plots get wiped after a month or so of non use
Finally getting rid of those highways \o/
I'd stick with the 6-wide cardinal roads unless you're going to make CTA an official thing
No "Spawn city", but maybe have it so that no builds are allowed within 100-150 blocks or so of spawn
You could have it so that speedbuild winners have their builds displayed around spawn
Fewer but bigger oceans - It's getting a bit crowded on the waters due to how small they are
A bigger initial map size during launch - With the new playerbase, you might want to do this
edit:
From an anonymous C player who's too much of a chicken to say it:
I want to see mods and admins that answer modreqs asap and not after 4 hours of being online doing nothing