Herro, Jovic, and Ware (plus maybe Jaquez), plus 3 firsts is a pretty good offer, even if the picks aren't super high picks. Even better if it is 4 firsts and some swaps. I don't know if it is true that Brown alone is better than that. Brown alone is better than all those players combined in my view, but the 3 or 4 picks add to this.
It is tough to comprare because the actual question is if what someone will give up for Brown plus what BOS would be willing to kick in is better than the MIA offer. It is hard to know what some team is willing to give up for Brown. I am guessing the MIA would give up Herro, Jovic, and Ware plus maybe 2 picks for Brown, something like that. ATL or POR or HOU maybe something similar.