Problem is he's overlapping with Aaron Donald, who does accumulate popular stats like sacks. I think he deserves to be in, but the voters have some weird personal criteria sometimes. Cortez Kennedy and Dan Hampton being in sets a pretty good precedent though - they had 58/57 sacks and 5/6 1st or 2nd team all-pro selections in 11 and 12 years. Suh has 64.5, 5 1st or 2nd team, the all-decade team, in 11 seasons. Probably not adding to the all-pro total at this point, but he's been better than both of those guys. Also the aura of intimidation - unless they decide all of a sudden "dirty" players shouldn't get in when they've been embraced throughout the hall of fame, it's a plus for him. Wouldn't shock me if he didn't get in, probably not first ballot for sure, but I think he's in.
David is tougher, although probably just as deserving. He'll have the counting stats, but lots of LBs can rack up tackle totals and I'm not sure voters will look past to the INTs/PBUs/Sacks/FFs etc. Not getting the deserved all-pro votes hurts too, but he has more time whereas Suh is still good but is definitely trending downward. If they force Kuechly in somebody will bring up the comparison and maybe David would get some traction but I don't see it happening. I'd be pretty surprised if David got in, even though he probably deserves it.