I thought everything here had been adressed, but as Blad01 is not accepting other peoples arguements for why this stage is neutral, I suppose I might as well contribute.
In my opinion, this stage is neutral, there are no dominating tactics for this stage, and only 3 annoyances as mentioned by Blad01. However, here is my counterarguement.
Looking at Blad01s post:
1) The ghosts can be a bit annoying sure, but there are so few characters whose recoveries are this bad to have to rely on it. Also, being on a platform offstage which you will soon be forced to jump off is not a beneficial position imo.
2) If you argue shy guys as being a reason for this being a counterpick, the reconsider your arguement. The one and only thing they really do is cause your moves to lag. They are predictable, and if you find that shy guys are effecting your performance, you need more practice on this map.
3) This is probably Blad01s most solid point, however, it is also one of the most easily compensated. SH autocancelled aerials are very very easy on this stage. The simple rule is, if the floor is sloping upwards, dont do an aerial with a few frames autocancel window. Learning the stage and position on this stage will put you at a greater advantage because of this. Whenever i play falcon or ganon for fun, I have no issue in using my aerials. Also, if you say this affects alot of characters, then there is no issue, as each character is not given advantage, although I still don't see it as a problem.
A few other points worth mentioning, the platform in the middle has no relevance to this stages position on the stage list. It changes, but the change in all does not bring about anything significant. Also and I can not emphasise this enough:
The factor which determines where on th stage list each stage should go IS to what balance does this stage bring in character benefits. Stages like this do NOT benefit certain characters substantially, therefore, as there is no major issues, it is neutral. Stages like Yoshi's in melee were counterpick not because of the extra features, but because of how beneficial this was to characters such as marth.