Even in Melee
this can still happen...
But this isn't an argument against defensive play - anything remotely defensive can turn into a monster if you're willing to be lame enough - this is just to make a point that no matter what you do, a little defense can go a long way and that that shouldn't scare us away from it.
I think some characters should have more relatively defensive playstyles within Melee physics. I also think camping is not as bad as planking - especially and almost exclusively if it's Jiggs planking, lol. A character like Mewtwo - if it's ever to be included - should play fairly similar to its Melee self. I know he wasn't great in Melee, but rather than making him faster in all respects for instance, a speed increase should be selective and slight and he should have more setups from stuff like an altered version of his side and/or down specials. Even just a short combo out of a special setup that leads into an up or back throw can be quite deadly. In
this example (2:38 to 7:05) you can see the potential that Mewtwo had even in Melee - albeit in Taj's hands. Now just imagine if a couple more of those reads were guaranteed follow ups and his side and down specials were more reliable/altered enough to be safer/more useful. This vid also shows how defensive play can still be prevalent and entertaining in Melee physics. Again, that's just an example - unfortunately using a character that may or may not even matter.
I agree that there are many Brawl characters that are just too campy for Melee, but I still want to see them be able to camp in PM, just less effectively and with legit and rewarding options for them when they get approached. Falco is somewhat of a "gold standard" in that respect. Any character with more camping tools like R.O.B. or Mewtwo should be slower but have rewarding offensive options once they are approached... but should be mainly approach punishers. Whereas characters with less camping tools, like Shiek, obviously want to use they're fast projectiles to setup an approach of their own and are far less reliant on them in general.
So, I'm sure I just outlined what the devs already knew and understood, lol. However, I was mostly just showing those that are worried that defensive playstyle, including camping - which I still think isn't as bad a planking which we know will still exist thanks to Jiggs

- will not be non exist in PM. It would inconsistent to ignore it. And to those that might think that defensive playstyles should be removed as much as possible, especially if it is at all attached to brawl - defensively oriented characters should remain thus, just a defense that works in Melee physics... imo, especially if projectiles are a large part of their game.
Well, there's my seemingly much more than "2 cents" lol.
(Took too long to write >.>)