I don't know if I agree there's no depth 2-4. If you want to say there's no experienced depth, I can buy that. But there's a ton of options at 2-3 - BrooksB @ 6-6, NM @ 6-7, TB @ 6-2, BS @ 6-6, JM @ 6-6, BlakeB @ 6-7, PS @ 6-3, AC @ 6-5.
One of those guys HAS to be able to fill in some minutes...