Frankly I don't know what Miami is looking for at tackle so I don't know that I can say Dillon Radunz is an especially good target for Miami or not. Under Gailey they drafted both Austin Jackson and Robert Hunt for the tackle spots, and gave an extension to Jesse Davis. That's not evidence of a coherent personnel philosophy as it relates to tackles. They've gone in-house for Gailey's replacement so it could be more of the same opaqueness. But one of the replacements is most definitely a Kubiak guy, so that does make you wonder if they're planning to steer more toward the Austin Jacksons and less toward the Jesse Davis's and perhaps even less the Robert Hunts.
If that's the case then you're looking at a Dillon Radunz quite favorably. He's somewhere between a Joe Staley and a Joe Thomas. His lateral explosiveness, mobility, maneuverability are all top notch. And he can run, obviously. He plays with a nasty attitude and shows some upper body strength in the way he's able to punch and use a player's momentum against them. He sits his but down and keeps a straight back while moving his feet and anchoring all at the same time, and he does it all very well and very naturally. He's been working with Joe Staley and it shows.
If he's not worthy of the #18 pick then I challenge someone to give me 18 players that are unquestionably better at football, to where they should go above him regardless of team need.