Nobody wanted to do this so I just felt the urge to do it myself.
This is exactly what you think it is.
The Unit Disposition Editors aka Chapter Unit Editor (now for EVERY chapter and not just chapter 1), an update and better documentation regarding the Item Editor (have the iron sword be a uncounterable dragonslaying magic-brave weapon that opens chests and gives you discount at stores) and finally a minor update to the class abilities (Bonus Crit, Unlock etc.).
Here's the link.
EDIT: I made updates to the Unit Disposition Editor. It now has Dropdownboxes for Characters, Classes and Items. This should make editing much more convenient.