Bit of an exaggeration, but I think this isn't wildly off. Of course, this depends in part on whether Newton or Jackson comes back.
Missing out on Timberlake means we don't have a guy (like Hawkins or even Calcaterra) who you could draw up plays for, force him the ball, and still get 40% shooting. Karaban shot 40%, but largely because his looks were open off of movement, screening action, or drive and kick. If he's the #1 shooting option and getting the Polley treatment, he won't be that effective.
A bad-shooting Castle alongside Jackson, another freshman, Clingan, and Karaban, is going to leave us in the same position on offense that we were in 2-3 years ago.
A good-shooting Castle will make us really hard to defend.