I think that leelue tried to say this:
When you add another option that is significantly easier to do and more powerful than several others that were already implemented, you reduce depth by making the other options useless.
His point is that RARing removes the need to use other techniques that could achieve the same result, but were harder to do.
While I agree that RARing makes some things easier, I do not agree on the part that it makes other options useless.
Also, I'm a Melee veteran that can't even play without my own gamecube controller and my own lagless TV, however, I foung RARing very intuitive and did not have any problems including it on my playstyle.
We all know about L cancelling, yeah. Stupid barrier to entry. Stupid fanbase.
I do not agree with that assumption. L-Cancelling is a purposefully introduced Dexterity Barrier, meant to give players willing to get better an edge over the ones that aren't.
I will give you another example that might change your point of view:
In DotA, there is a limited screen-space, and no Zoom-Out options. The creators of Heroes of Newerth, a DotA clone, kept the same screen-space, without any zoom-out options.
This forces players to use the mouse to navigate more, and also reduce their ability to spot incomming attacks and other things.
Several people complained about it, saying that it was an old engine limitation that should have been abandoned by now. Still, the developers kept it, because it favors palyers that are better at Map-Awareness, quicker with the mouse, and overall better at the game.
It is the same thing with several other games. Soccer only allows you to play with your foot. Basket forces you to bounce your ball while moving.
Those are all Ability Barriers, either Mental or Physical, meant to favor players that spent time getting better at those games.
