It's nice to see the community, after 30 years of basically nothing, fix up FF2 on NES. There have been essentially zero romhacks that are not a complete overhaul of balance, text etc. Now, in the era of "quality of life" romhacks, it's refreshing to see old games be polished to a mirror sheen.
The only one left after FF2 is FF3. I want Final Fantasy III Restored. Like the two games before it, there are several bugs involving how spells work (though not quite as many) and a large number of elemental equipment doesn't work at all. And like the other Restored hacks, the Prelude theme could have the extra section that later editions have, and a fancy title screen could be added where previously there was none. Optional balance changes could be applied that reflect how FFV and FF3DS handle the job system (the FF3 Redux hack already does this to some degree, but it might've gone too far in a few places).