I agree. Watching the Spurs defend the Suns last year, they are great at pressing them out at the three point line making it difficult for the suns to get an easy look for 3. That often killed us because we weren't particularly strong at attacking the basket. I love Raja but he is not the best at slashing to the basket, nor is Shawn, or anyone besides Steve, Leandro, Amare, and occasionally Boris when he actually does it (although if what I am saying is right you would think Leandro would have had a lot better series than he did, so maybe I am wrong).
I am not saying Grant Hill is the Savior, but I do think he makes us a little better offensively. It would be great if he could shoot the 3, but I think he makes up for it with his good midrange jumper and ability to attack the basket and get to the line. The one draw back is of course that JJ could sometimes knock down the open three.
The other thought is this...
With our starting lineups last year Steve was often the only person who could penetrate. With him penetrating the defense would suck in a bit giving him the opportunity to dish it out to Raja, James, or Shawn (who always scares me to watch shoot the three even though he isn't an awful shooter) for the open three. Well if Grant has the ball and penetrates and the defense collapses we still have Steve (who is still probably the best shooter on the team imo), Raja, and Shawn or whoever there to knock down the 3.
I don't know maybe I am just making stuff up but it seemed good in my head.