Although over hyped, I think Rosen has a good shot of being successful in the NFL, especially if he ends up with any other team besides the Browns.
As for Darnold, he has bust written all over him. I think ESPN and the media hyped him up too much. They're obviously looking forward to hound everyone with stories and talking bits about the "TWO LA QBs" in the offseason. Makes me wonder if that's the reason why Darnold is so over hyped. ESPN in particular has a hard on for him that's hard to explain. Even when they lost to Ohio State in the Cotton Bowl, the narrative was "how Sam Darnold came up short" and not "Ohio State wins." Hell, I couldn't even watch our ESPN replay vs USC earlier in the season, as the commentators did nothing but talk about Darnold and made every excuse for him as to why he and USC were losing.