From the looks of your PF and PA, your offense looks fine, but your defense is terrible. Adding this new guy into the starting 5 isn't gonna help that.
In US D.V, I've found guys with average defense to be decent, respectable defense to be good, and above that guys are even better (obviously). Last season most of my guys had 7 defense (and good secondary defense-i.e., good ID on guards, OD on bigmen). I was tied for the best defense. If you can buy a cheap guy with defense around those levels, it would probably work out better than this guy.