Alright guys, let's use our brains here. (not saying that you weren't before)
What are the chances really, that they take out WDing. Think about it. If they use the same physics engine, then there is no way to remove it unless you remove air dodging, which would be an absolutely stupid thing to do. Plus, it adds a higher level of play to the game, because you have to think faster to react to your opponent who is about to release a fully charged fire blade with Roy. (if you don't wavedash immediately, you are going to get KO'd)
Without WDing this game would have nearly no level of serious gameplay. All you could do is master dashing into a grab and u-throwing your opponent so that you can u-tilt into an
u-smash, then f-smash combo. Pretty boring isn't it!!!!