Thanks for the reply.
From your comments, it seems like we really only have one defensive liability rather than two, with that one being Calderon. By saying you don't like Matthews covering PGs, are you implying Calderon would be better off guarding the opposing SGs? To me, wouldn't that make Calderon even more of a liability? With Dirk and Marc both being solid help defenders down low, we're well equipped to challenge any dribble penetration given up by Calderon. I'd rather have that than Calderon giving up a huge height disadvantage. Besides, I think a team can afford to have one defensive liability; Calderon is going to be our weak link, but the rest of the starters can pick up the slack, especially under the guidance of Thibs.
That being said, your comments have made me realize it makes more sense having Pondexter as the starting SF. Teams can't afford to double off him, and he can also guard opposing PGs (although like I said earlier, I'm not too sure how beneficial that'd be). LRMAM is mainly there to contain bigger SFs that QP might have some trouble with. I should add that LRMAM is arguably the best defender to throw at Lebron, KD, Melo, etc. We have a lot of positional versatility to match up with all sorts of teams.