Tested (not working)
[MapMenu]
fMapWorldMaxHeight=XXXX.XXXX
fMapWorldMinHeight=XXXX.XXXX
fMapWorldTransitionHeight=XXXX.XXXX
fMapLookMouseSpeed=XXXX.XXXX
It seems that there were also some other settings being ignored as well, I just haven't gotten around to checking them all.
I tried large and small extreme values that would normally work, but didn't see any changes in-game. I launched the game normally to make sure that SKSE isn't affecting it. (dunno why it would, but never hurts to check) And I've made sure that 'Skyrim_default.ini' isn't controlling the settings.
I really have no idea what the problem is, and would check Update.esm, but the Creation Kit hasn't been updated with the game. :/
If anyone knows a fix I would appreciate it. Thanks ahead of time for any help!