FF6Tools - Browser-Based ROM Editor

Yes, I would love some help! Do you have a GitHub account? I'm not well versed in GitHub stuff, but I think I could add you as a collaborator and then you would be able to make changes directly.

Unfortunately I don't know Java/Json, so I can't directly alter the source code. I probably can read and understand since most of the new languages are C/C++ syntax like.

I have plans to auto-populate the tabs on the left side with ROM data so that it acts like more a file browser/navigator. That would include lists of events, dialog, monsters, etc. for easier access. But right now it's hard coded so it only lists maps and battles.

That is exactly what I was hopping for. This way we will have fast access to different elements!

I agree about the FF5 battle editor. It needs a lot of work. Although you should already be able to change monster coordinates by clicking and dragging. Let me know if that isn't working for you.

Yes dragging works. It will be nice to be able to see/edit coordinates as numbers. I don't know how it is for FF6 but in FF5 visibility plays huge roles. Pretty much each more complicated battle or almost all boss battle manipulate visibility. As visualization you may use my trick - use high value transparency. Transparency works well on bright/white background. For more darker ones maybe things like gray-scale ...
On top of that there are FF5 specific fields - like how many ATB you gain, assigning a pal for each monster, Escape %, Music Control, Visual Control,... Check this screenshot, it should give you some insights: