waiting in smash is the preservation of your options prior to dedicating your character to an action, waiting is really broken in both the neutral game and the punishment game for resets because it significantly more likely ensures the desired outcome at a very discounted cost. i guess that conversation can be saved for a different thread, but the short version is that nothing beats it other than going for surprises, which are generally pretty bad if the opponent uses good positioning in tandem with waiting.
i've read all of sirlin's articles and i've disagreed with a few points of his in the past. a weighted RPS game simply changes how the "best decision" is decided, although i assure you that you could use some kind of data mapping and trending to determine an objectively best decision between the three and win out on it in the long run as a numbers game (in the early days of melee for example, you could argue that the fox-sheik-marth game had a skew towards marth winning over the other two). however this is a pretty poor example, since you can win 7 rounds and lose 2 and still not reach the desired result in a tournament, so playing the numbers game in the long run is not favorable for a bracket. also, both players are prone to mistakes in determining the best option, so all you have to do is be relatively better than your opponent at it and perfection is not required.
i would posit that it is also why all of our best players atm play very linear and automatic, as opposed to clearly adaptive. it's very easy to find top player sets where both player use roughly the same tactics for the entire set or tournament regardless of whether they are winning or losing, but it is much harder to find a real set where you can tell that a top player adapted in some way (ek vs amsah was ek playing terrible for the 2nd half of the match and just throwing out blind fsmashes, which is a mal-adaptation on his part more than it was an adaptation for amsah, which is the closest exammple i can think of off-hand). i would think that this reinforces the idea of always using the best option, but i'm not ready to go there just yet.