There are no plans to impement a level header editor like Workbench did. While something like that would be convenient, it would also be cumbersome to keep it updated, or even just get it to support the large amount of level header parameters that currently exist. The Script Editor, as Goldenhog mentioned, should work well enough in combination with
this wiki page about level headers. It might seem overwhelming at first, but the provided example is a great starting point that's easily tweaked for custom levels.
As for the FOF Wizard: there is a more advanced 3D Floor Mode present in Ultimate Doom Builder, an actively-maintained fork of Doom Builder 2 with many improvements over the version Zone Builder is based on. There are plans to move ZB to UDB sometime in the future, but it's currently unclear exactly when or how that's going to happen.