I think you underestimate the mentoring Porter could do for those young linebackers and the whole defense, which would help them all in various ways, kinda what Haley did for our young pass rushers in the early 90s, when he was in his early 30s, I think that turned out pretty good, remember? Now I understand they rotate the D-line and all, but still nothing wrong with having a vet like Porter, who plays linebacker the way it's supposed to be played, and in the same system.
I'm all for playing young players, but I'm also all for having SOME mixture of veteran leadership with those young players. I think you're just looking at the tangible aspects of having him, money, roster spots, playing time for the youngsters, but underestimating the intangibles he can provide, and will provide for Miami.
You say it would be a COLOSSAL mistake, well that's goin' off the deep end a bit. It would've been IMO a COLOSSAL benefit/addition.
I still don't understand why Jethro didn't draft him in the first place, who did he draft instead? Soloman Page? I think? C'mon.