I see the Combine as either confirming what I saw on film or as an invitation to assess a guy I haven't or reassess a guy I may have written off too quickly. What you shouldn't do is let the Combine dictate your draft grade on a guy. If you think Sadiq is a top 15 pick based on his play, great. If you didn't see him as worth a top 15 pick, the Combine should at most prompt you to rewatch him. It should, by itself, cause him to make a huge jump. End of the day, football is played on the field in pads.
I haven't assessed Sadiq yet, so I am taking the Combine performance as a reason to watch him.