This is a good point actually. I know the Circuits can be used as compositional tools, but with the DJ filters and lack of audio over USB for production, they feel more like live performance tools. So as you say, that makes the pack limitation a little more glaring if you want to actually perform multiple songs live.
I noticed they have a new creator (Dylan) on YT, and he uses the tip I mentioned which is to use a pack for an entire song. This is sortof hacky and it’s more management to keep flipping between them, but it is one way of staying welll within the limits of the packs on the Rhythm - but then it does potentially make it in a roundabout way more appropriate for writing than performing.