Very harsh.
Kyle Joseph (at 21 years old) scored 9 League goals in 31 starts (many from out wide) in a really poor side. He had no threaded balls from Rodrigues, no marauding Greg Leigh, no out-and-out wingers like Mills or Edwards. He typically had to create all his own chances.
If he'd started 18 games for us this season, centrally, I reckon he'd be pushing double figures already. And I don't think it would somehow nullify the impact of Rodrigues - Kyle Joseph had work ethic, he could press - and score goals.
Harris does offer something, but this particular comparison does him no favours.