Would be good if this plugin preserved, somehow, layout code from various page builders, e.g., WP Bakery, Avada, etc.

It does not do so now.

So I had to rely a lot on the native, unsophisticated, Wordpress Export/Import tool for last week's Blog migration. It DOES preserve the WP Bakery codes, which really saved us.

Please bake this into WP All Import/Export (in time for my next migration project!).

I would much rather use the incredibly sophisticated WP All Import/Export for any future migrations.

Mark