Hi Inès,
I followed that structure in my application, which I submitted based on the previous format (where less characters were available for project description). I don't see any specific reasons to follow a different format, as I believe it is still important that you prove to have gained experience in all process groups, even though you are not required to have experience in all of them for each project you managed.
I also had some ongoing projects that I included in my application, for which I specified the expected project outcome as well as the key deliverables produced so far.
Hope this helps,
Gabriella