Are you referring to "Drop footprint edit mode." ? http://docs.kicad-pcb.org/doxygen/v5_road_map.html#v5_pcbnew
If so, I believe that section discusses code changes that are internal to KiCad only. There might be some minor changes noticeable by the user, but I don't think there is a plan to drop the footprint editor.
The roadmaps are written from the point of view of the developers, so you need to read between the lines a bit to understand the impact on users.
As far as I know, there are no changes in this area over v4.