He's in a weird spot. We aren't a running team and he's third string pretty much out of the gate despite being a relatively high pick from a good program.
That said, something is obviously up. We can speculate all we want but we have no real idea. Eventually, the truth will come out.
To answer the question, I'll be worried if he's still useless at the start of next year. Not everyone comes out of the gate as a rookie ready to go.