The next consideration is around the number of objects on a report – keep it simple. Avoid building a giant monolithic report, the more objects you use, the slower the report will perform on PBI service, iPad’s and even to develop. This is especially true for tables/matrices which will each need to fire off separate DAX queries to return the data elements. Too many objects also has knock on effects for exporting to PowerPoint as objects will overlap with one another more which may not be as much of a case within PBI service but will affect other apps. You can use the selection pane (in the view tab) so move objects above/below one another which will bring forward/push back the elements.
This is advice tailored toward Power BI in particular, but much of it also applies in general.