Well, I haven't done any serious composing with Max so far, I've more used Csound for that. (Just a matter of personal preference. I prefer programming the music in text to dragging lots of tiny boxes around the screen and connecting them with cables. For lots of people it's just the other way round.)
What I love Max for however are live electronics, control mechanisms etc., which all are quite impractical in Csound. Right now I'm programming a control algorithm that turns 6 tape recorders on and off via a microcontroller for an installation in about two weeks. Fun stuff!
I've often felt a lot of music created with Max (or pD) sounds a bit similar, which makes it even better that your piece -doesn't- just sound like that. And you're probably right that one can still optimise some things about the formal structure there, even if it already works quite fine. I guess you can always improve things in any composition though
