It's a good question. I have no idea what Danny is thinking. Backup SG seemed to be one of the positions where we'd found a passable replacement. It certainly makes me curious about what happens with our rookies.
As of right now, we have absolutely terrible roster construction. I mean, just really, really bad. We have five players who are probably best suited to play shooting guard (Ray, Tony, Giddens, Pruitt, and House), only one "true" point guard, one established center, one power forward with legit size, and one experienced small forward. Ugh.
I agree to a point...although I don't think it is that terrible...or that different from many other contenders.
I also think you are not giving Pruitt enough credit. I think skillwise, he is the perfect backup PG for this team. Yes, he is a better scorer than passer, but he appears to be a good enough passer, is an excellent ballhandler, and a very good shooter. Basically, his skillset is Eddie House with better ball handling, and (IMO) a better feel for the PG position (in the little I have seen him, he seems to be better at actually getting the team into the offense, and moving the ball with purpose). The only question with him is whether his skills translate to being an actual NBA player.
I actually think this team will be all set if they can find one more bigger wing (Darius Miles anyone?) to a vet minimum contract. Then they can make a run at either Mourning or PJ midseason. That will give them more time to try to free up a roster spot.
I actually think this is not a bad roster (no less risk, with higher reward than last year IMO).
Rondo, House, Pruitt
R. Allen, T. Allen, Giddens
Pierce, Miles, Walker, Scalabrine
Garnett, Powe, Baby
Perkins, O'Bryant
You also could be looking at more trade options at midseason. Guys like Tony, Giddens, Walker (who I DON'T want to trade), Pruitt, Powe, or Davis, all could potentially gain some value (I think all of them have marginal value at best at the moment). Plus, Scalabrine will be pretty palatable at that point, since he will be an expiring contract next season, and they could send $3 million, which would likely cover a buyout for him.
So yeah, this roster is not perfectly set up right now (but what roster is?), but Danny is giving himself some flexibility, with lots of options of guys who could really help them this year.