Give it time, o.
This time last year, RG3 was in the 20s on most big boards. Most of the draftnik guys are still prepping for week to week games and haven't even begun to tear into the tape of these guys' in great detail and when they do, he will end up in the top five of every big board.
The kid is handcuffed to WV teams that poor offensive lines and defenses and right now is getting docked points for the losing streak.
I bet in the next 2-3 months his stock skyrockets.