If you’re programming for yourself, do whatever makes sense to you.

When I’m programming a remote for customer use, I try to keep things as simple as possible. I don’t give them a “Device” page at all. All they see from the Main/Watch/Listen page(s) are activity macros with jumps to a single (if possible) device functions page. So for devices which are also activities (like Cable Box, Blu-ray, AppleTV, CD Player) I’ll go through the IR codes and remove commands which don’t work (like “PIP” on Cable Boxes) or are typically not needed (DVD “Angle”).

All devices / IR codesets for other, non-user-facing devices (TV, AVR, HDMI Switch) are on hidden pages so they can be aliased in macros. If I need Zone2 codes for an AVR, or discrete input codes for a TV, I’ll add that device on a hidden page; if I don’t need the code for a macro, I’ll leave that device out.