BBD is big and he tries hard. So he can be effectiveness in some very limited situations. But that is about it. He just isn't an NBA basketball player in my opinion. And that jumper? It isn't reliable. Some days he get lucky and they go in. In the heat of the playoffs, I wouldn't have much faith in him to hit those shots.
Indeed, I think our biggest need right now is to have a big with a reliable jumper. We need that more than length IMO. That's why I would prefer Smith. But I understand the need to go after Moore given the situation.
While I disagree, and think that BBD is an NBA player, but like any role player, he struggles when asked to do go outside his strengths (which are position defense, setting picks, and moving the ball on offense), I absolutely agree that we do need a big with a jumper.
More directly, I think what we need more than anything is one more two way player. Right now we have a bunch of guys who are strong on one end, and weak on the other end, but very few that can play both ways. This is why Joe Smith would be such a huge pickup, because he is average or better on both ends of the court.