Are we actually debating this.
Is this what I am really seeing.
I am not using question marks because it's obvious that if Smogon, in all its debating, decided as a majority and in a scenario where there are more 700~ mons eligible for OU play, that Greninja, Protean or otherwise, is too good to be allowed and is detrimental to team building or standard play...
That means that in Reborn, especially given the scarcity of good mons and moves, Greninja (which still manages to get excellent moves despite the lack of most standard TMs or tutor moves as yet) is very clearly too good to be allowable.
For the record, Greninja fulfills the defined roles of a Sweeper, a Hazards Lead, a Suicide Lead, a revenge killer and a Pivot. In fact, Greninja can fulfill the role of anything that is not defensive. With the help of even half the usual size of a battle team, Greninja in the hands of even a mediocre battler can be devastating to the point where even skilled players may not be able to withstand its use. This argument seems to me to be pointless. I suggest that some of the participants go to Smogon's website and spend half an hour looking through the archives on Greninja before attempting to base points; what one may feel is generally superseded by what is a fact. I also suggest re-reading what Smogon, and standard competitive play, defines as a Sweeper, a Check and a Counter.
I don't see what else can be meaningfully stated.