@pierre-gilles, here is the variant (just for step 3 of my example) in which the « If… » is no longer in a section, but integrated at the start of the « Conditional blocks » action.
I also put the A/S back in the numbering (since it will be translated), added a collapse/expand icon, and something to navigate easily between ‹ If ›, ‹ Then › and ‹ Else ›, as well as a ‹ Next › that would send to the end of the ‹ Else ›.
I didn’t choose between the cross and the trash can for deleting a block or an action. I don’t know which you prefer for consistency… But I also think that’s not the purpose of this feature request 
Does that work for you, and shall I adjust the other steps?
