I agree with just about everything here but your conclusion.
No, Bogans isn't going to light it up from three and shouldn't shoot a much better percentage in theory. But he is going to be camped out in the corner and he is going to take the open shots when he's supposed to take them -- he won't be camped two-feet inside the line or off trying to do something inside the three-point line off the ball that will congest the paint for Tony's penetration or Tim's post catches and moves; Bogans would be out there to serve a purpose for a handful of minutes to start the game and not much more for the rest of the game, ideally.
The problem with RJ is he is hesitant and that he's not confident in letting it fly. Pop might as well put Mason in the corner if you're going to ask RJ to start knocking down threes in Phoenix at the moment (because it might as well be a turnover if you're telling a guy lacking the confidence in his three-point shot to just sit behind the line and throw it up there).
My thinking is having the Parker, Hill, Bogans, 'Dyess and Duncan lineup balances the spacing, defense and overall continuity to set the tone and rhythm, for the team and individually, for the remainder of the game -- get Tony and Tim rolling and get off to a better start defensively; bring Manu in with RJ, and maybe even Blair, and let the offense run through Manu to get them rolling; and them unite them all to end the half. Everyone gets a better quality of touch and the opportunity to find a rhythm and feeling good about themselves, then they put it together as a group after all have gotten involved -- simply throwing out the best players from the jump not only depletes the bench but it, more importantly, doesn't utilize the talent all that efficiently or net a great result (if you've got players being wallflowers because the spacing's not right or they're not getting enough quality touches).
They've had two lineups this year that have managed to get them on track and find a winning combination. One's what they used against Dallas and to start this series; and the other's the one I'm suggesting -- to not choose between the two would be a mistake at this point, IMO.
Agreed. And as far as Bogans goes, it's a necessary evil in my eyes, not a preference. If Temple had been with the team all year or logged significant minutes, I'm pretty sure I'd be sold on him over Bogans to do what I'm hoping from him: take the corner 3, play some D and just compliment Tim and Tony long enough to get things going in the right direction -- although the Spurs could probably get more out of him since he's got more potential talent.