The Potential for camping...
hmm
I really disagree with that argument considering half the stages that are legal already have this potential, basically it excludes Yoshi's, Battlefield and FoD.
Like FD is a huge flat stage, leaving this, no room to really avoid projectiles except for your own jumps/floats etc. Plus considering characters like Fox/Falco are so fast with so many options, by the time you closed in, they could just bair you away and keep firing. Moving on.
Stadium is still relatively large with two small platforms. Yes the stage chages but when it does half the time it just becomes Corneria 2.0. So again Moving on.
Dreamland is a large stage with its 3 platforms. If anything because of these platforms it reduces the potential to camp out of any of these stages.
err, I dunno I think FD wouldnt be too bad either depending on characters involved.
Im probably wrong with my thoughts but whatever thats my 2 cents.