This review applies only to the editor, which allows editing mods and game files.

• It assumes a very wide screen, and only vertical scrolling is available. On Deck with native resolution, multiple properties are visible with only 3 letters shown, and many of these are missing tooltips.
• Opening xml files from the menu in game mode on Deck straight up doesn't work; I find it more convenient to edit these from my tablet or desktop with an ssh connection, as I don't have a USB keyboard.
• In general, the editor has far less polish than the main game (which is somewhat understandable as a tool, but the alternative is hand-writing xml files...)
• I recommend using git (or other revision control) on either the data directory as a whole or on individual mods to help keep track of things. It may simplify diffs if you check what each edit changes and rewrite the changes to keep original ordering (the game appears not to have been created with the same version of the editor). I also recommend at least checking diffs after changes, as I've caught the editor adding new properties and other data.
• Be careful clicking in menus when using the triggers, they're treated as long clicks; if you have the cursor over a menu item when you release, you will open that specific item (I keep opening the first item in each menu by mistake). Recommend holding trigger down, then moving cursor to menu scrollbar to release.

For basic changes like tweaking cost of items in mods or making them less overpowered, the editor is fully usable.