Just a weird idea I had just now, in thinking about how to show more of Ben’s childhood on the Falcon, that the training ball could now be one of Ben’s old toys:
It would need to be a physical prop filmed and rotoscoped into the shot, but it would turn a moment of fanservice into something which recontextualizes where Han is, mentally, that the memory of Ben and his childhood interests still has such a hold on him. It might also give the Rathtars a little bit of relevance in the larger story.
Probably impractical/confusing/not really worth the trouble though.