Everything was cool up until this little comment at the end. Items increase and encourage camping. Even if playing as Sonic or Ike, it encourages the player to just wait around until a good item appears and take possession of it.
No it doesn't. Getting items is all about stage control and actively covering land. Because of spawn point spread, very few stages allow for campers to maintain stage control - you have to get it by actively keeping your opponent off of it. Once you have an item it also boosts your approach options, making you stronger against a camping style.
Of course, there is the idea that one could just roll around and run (which isn't quite like camping, seeing as how it's simply avoiding attacks rather than baiting and countering) until an item showed up, but whether or not that's an issue or not needs to be decided through test play, not theory. Although if we wanna go that route, we should consider that nothing like that was the reason items were banned in Melee... and why? My idea is because ultimately (legal) items aren't good enough to base your entire strategy around.
And knuttz, testing with mushrooms was a horrible idea. When items are on, you generally play with items that have both pluses and drawbacks (classic example is Marth picking up a ray gun - he now has projectiles, but he loses his ridiculous grab and fair, etc.), and do not infer an immediate advantage like some of them do (i.e., no healing, no stars, no mushrooms, etc.).
edit: There was a really good post about items on SRK, and I'll try and find it but if I never get around to it, it basically said we should definitely at least try items now that the reason they were banned in Melee is gone. Why? Because if it doesn't work out, fine, but if it does, we've furthered the community by evolving the gameplay - i.e., no risk, potential reward. That's why I hope Evo goes through with items, because I'm curious.
I'm not pro- or anti- item, really, and if Brawl was as fun as Melee I wouldn't care at all about it, but I'm just saying that now I see an opportunity and I think we should at least try it out.