I think the use of Brown is more of an indication of the weakness of our TEs and FB in blocking. We wouldn't be getting all excited about a TE or FB blocking a LB.
At wr, he's not going to pull any safety help. Couldn't Hanna have been as much threat lined up wide, if not more? A wr who routinely beats one on one coverage, or threatens deep to pull safeties adds to the offense. That's what we need a WR to deliver, not a little extra blocking.
As the article says, he's a "light end", a too small TE who still gives you pretty good blocking. The one advantage I see him giving is with teams who treat him like a WR instead of a light end, and leave a normal corner on him. Then you bring him into the line, let him block a LB, and if he's successful, you've blocked a LB and only brought in a DB in the box, for a net win, if that overrides simply the increased crowd in the box.
But if teams match him up with a light coverage LB, or big DB, we're probably losing. What I don't like about Garrett is that he always seems to think that bringing a blocker into the box is always a win, failing to see that this also brings another defender into the box, for no net plus on numbers, and a net minus for a more crowded box.