First....no forward intent? The forward lean, if anything, exaggerates forward intent! If he was leaning back on his heels, then I could understand someone saying it is "pretty hard to have any fwd intent."
Second...obviously its hard to know someone's body structure without seeing or feeling it tested. Nothing in this clip really put it to the test. But I have felt Jim's structure, and it is solid!
Third....why do you think there is no centerline here?