an upvote here, especially for column names (labels), this is an essential feature to support which will make the tables look much nicer! but I see this in "how do I?", not as a feature request, let's create one
p.s. at the moment the order seems to depend on the order in the dataset (though JSON is technically an unordered set I noticed the order in which you specify the keys defines the order in the final table), at least if you visualize the result of a JS transformation. But I agree having the table respecting the order of its dynamic column settings array is much better!