Better UI
Updated & Bigger Bysan UI
The version of Bysan UI shipped with Eden is a bit outdated, and lacks many of the higher resolution maps. I can't find a link to it, though, at the moment.
If you have a larger screen, like to play in higher resolutions, or generally just want a (in my opinion) better experience, I would highly recommend installing the custom upgrade to Bysan UI done by user @Rhareg on discord: you can find it here on the Eden discord.
Custom Eden Maps
If you just want to update your maps to better versions of the existing ones specifically for Eden, you can find Hazefest's edits right here. These should work with any UI you're using.