I will give you tOSU has not produced a lot of NFL QBs but the conference currently has a strong group of QBs including 3 Pro Bowlers, 2 HOFs, and arguably the GOAT. Who is currently the best SEC grad starting in the NFL? Cam Newton? Mathew Stafford? Heck Kirk Cousins is rated above those guys: http://www.nfl.com/news/story/0ap3000001007337/article/qb-index-patrick-mahomes-leads-yearend-rankingsI'm guessing you're a Buckeyes fan? I'm not. I'm not big on Haskins. I think he's going to struggle as well. He played in a conference and program that has not produced alot of NFL QB's. He generally played against non-NFL calibler defenses and especially linebackers and secondaries. We'll find out pretty quickly if he can make the transition as he'll likely start for the Redskins out of the gate.
In general, the quarterback position is the the hardest to gage in NFL ability, and each year, we get snookered with multiple "can't miss" prospects and some teams need QB's so it's a forced pick. I think we'll see in 5-6 years that this was one of the worst years to draft a QB ever. I'm not sure any will have much of a career.
Also, the NFL game is changing. You now need a QB who is quick and very accurate with his throws, Patrick Mahomes is the new the prototype not a Manning which is Jones' style. That being said unless Haskins improves on his foot work he will struggle too. He is smart and accurate but he throws too frequently off balance and those fluttering balls will be picked off in the NFL.