Think of it like this. PocketFMS just provides a full and complete list of data - airfield locations and names, airspace geometry, etc. Nothing more, nothing less.
Geography determines where these items should appear on the screen, but it is the EFIS which determines what font size to use for text, where to put labels relative to the related symbol, how many lines to split text over, and indeed whether to display symbols and/or text or whether (to avoid clutter) some information should not be displayed. PocketFMS has no control over how the panel displays our data. If you looked at the same area in PocketFMS you might see a less cluttered display because the PocketFMS display software manages these aspects differently, but we have no way of enforcing our display logic onto the panel software, as that software is entirely developed by AFS. The only way we could declutter your display would be to reduce the number of airfields, etc, in our database, but we have no idea which airfields you might want to use and I'm sure you would be unhappy if you tried to plan to an airfield only to find we had decided not to include it!