The unfortunate reason for that is a data editor can be whacked out in a couple of weeks (well, at least an MVP).

Making object editors takes a lot more effort, especially considering all the different objects PostgreSQL has: schemas, tables view, materialized views, indices, functions, sequences, etc.

I'm struggling with this myself. I'm currently trying to add object editors to PG Commander, and it's months and months of work. I wanted to have a table structure editor in PG Commander 1.0, and now, more than a year later, I'll finally be able to deliver a basic table & view editor in version 2.0 -- you can try a prerelease here: https://eggerapps.at/pgcommander-prerelease/