about a week ago, DJ Nintendo came to Boston and we had a fairly long conversation about Doc.
He felt that he and shroomed have pushed Doc to his limits, especially in Nationals where you can expect to run into players who can adapt/have a deep understanding of the MU.
I'm newer to the boards and only have appx. ~1 years worth time of playing competitively, but I do believe that the character, while definitely not the strongest at first glance, also (to me) feels unoptimized and not completely developed (as compared to say, Fox)
Also on the topic of people switching: if you feel like you should switch, I would recommend doing so and committing to it for x amount of time. I don't think its being "lame" if you switch because the end result will make you a better player as long as your doing it because you want to continue to enjoy the game. I had a Falco stint for about half a year and only switched when I realized that, while I felt like my results were starting to improve a lot, I just wasn't enjoying the game as much.
Anyway, I hope to one day put some vids up where you can hopefully all critique me up the @$$. keep the good doctor alive and fighting the good fight