"There's no debate. If simply being strong and yelling was the key to vice shout, literally everybody in Super would be breaking dimensional boundaries left and right."
Can you name me one instance of a character putting up some effort into their shout to amp it with Ki in DBS? I frankly recall Goku breaking through Hit's dimension to be a strong case that breaking through dimensional barriers as supporting evidence; on even larger level since it's breaking through it with one's aura. The only time I can really name when someone actually put force into their shout/yell is UI Goku powering up, and even then that's in the World of the Void where there's pretty much nothing but the Arena.
"SS3 Goku in the Buu Saga shook the planet and his energy was felt across the universe, no portal."
Maybe because simply powering up isn't what Vice Shout is at all?
"Kale was screaming like a maniac in the WoV, no portal."
Have you... ever thought of the fact that the WoV doesn't have pocket dimensions? It's described as complete void and nothingness many times, a place outside of the regular universes.
"Goku and Kefla powering up shaking the WoV/stage, no portal."
Look above.
"Only three people know the technique and have done it, simply warping the same space isn't as impressive."
https://youtu.be/_g6evRAYY5o?t=1m48s
This is a video of Gotenks performing the Vice Shout. Notice how he has to pause and actually prepare himself in order to do it. Lets compare this to Anilaza.
https://youtu.be/KJ91EsBV8PI?t=3m7s
See a difference? One is being spammed and also being used to kick Piccolo's friend's asses. There's also the difference of being able to warp your fist so that it comes out in another position from another area; which is again MECHANICALLY DIFFERENT FROM THE VICE SHOUT. And even if Vice shout is more impressive, are you saying Piccolo suddenly can't be impressed by something lesser?
A little hyperbolic example, Just because I've fired a Rifle before, does that suddenly mean I'm not allowed to be impressed by a pistol?