The 2,000 CI is the most versatile size of pack for dayhikes, hunting, camping. Everyone needs one, but there can be big tradeoffs. Closet space. Cheap frames. Poor load support. Bad construction.
There might be an answer – the Black’s Creek Remedy 7 Answer – a backpack that zips right onto the well-made Grip frame, but folds so small you can pack it in your base camp pack.