Agreed on it not being a showstopper for Dragon in general, I just don't see as a replacement for Lockheed's Orion (personal opinion there - I'll admit I'm probably biased since I work on Orion). There *could* be reason's that it can't be beefed up however, such and added weight, mass etc becoming too much for its launch vehicle. But that's not to say that it can't be upgraded at all.
Also agreed that I haven't seen anyone *respectable* propose "Space-X is our only hope" either. I mostly see these comments online packaged with more doom and gloom for NASA and Constellation. And with Space-X's performance record, I don't see why Orbital (per se, they aren't perfect either) doesn't get all the hype.
As far as commercial LEO transportation, I'm pretty much all for it. Constellation is meant for exploration in my eyes. And the longer we keep shuttle, the more money is drained from CxP.
The question I ask is: Once we choose these "commercial" launch companies, do they become just another contractor in bed with NASA, with cost increases, heavy oversight, and get flamed like LM, Boeing, etc frequently are?