This is why I don't like the new way the NFL does the Draft evaluations for kids. They offer 3 grades- Potential 1st Rounder, Potential 2nd Rounder or Neither. Too many kids get that "Neither" and probably assume they're sitting right outside the 1st two rounds and can move up with a good Combine or Pro Day. I personally like Njoku as a pro but I bet he doesn't go before the 4th round if the supposed Draftniks are even close to right. Hopefully the kid isn't sacrificing a lot of money AND the chance to play with his brother.
I think the way the NFL does Draft evaluations for juniors is spot on.
It indicates whether you're seen as a first or second rounder. If you're not then you're taking a massive risk leaving school early. It's aimed at reducing the number of raw kids leaving college early for the NFL - it's plagued both systems for a while. They're chasing the money, they're leaving their college team in the lurch and they're not ready for the NFL. It leads to lower quality play in both formats.
Obviously if a 20/1 year old misreads 'neither' as "well I'm a good Combine from being taken in the second round" then there's nothing you can do about that.
Someone like Njoku has NFL GMs are licking their lips thinking they can get an athletic freak of a TE later than his physical talent indicates he should go because he's not mastered his craft in college yet. He can't block in-line. He has concentration drops all the time. The perfect guy to draft in the third round and stash away.