Darren Howard a free agent bust?

He has 19 tackles 4 assists and 3.5 sacks & 2 FF's. In comparison Charles Grant has 27 tackles 8 assists 4 sacks and 4 forced fumbles.
Will Smith has 18 tackles 13 assists and 5.5 sacks + 2 FF's.

So overall he is playing fair. Not worth the big FA $$$ he got IMO..