one simpler option for ball hoarding is something like what I have on the back of my bot:
it’s essentially just 2 standoffs and a rubber band, so it’s very very simple, but it only holds one ball as opposed to 2.
I think if it’s easy to implement, a hoarder is nice to have, but I wouldn’t go out of my way to design around one. its a very minor thing that’s only useful for in person matches.