The way I read the SCC was that while it recognises the gains to be had from a properly periodised training plan, it questions how applicable periodisation is to the average climber who wants to climb throughout the year.
So periodisation (which as I understand it focuses on building a base, then training hypertrophy, then training power, then training recruitment/strength, then training power endurance/endurance - then performing) brings you higher highs but also lower lows.
The SCC pyramid progression system seemed to me to emphasise keeping all your elements ticking over in a year, so in a week you did one session building a bouldering pyramid emphasising power and recruitment, one session doing power endurance exercises like 4x4s, and two sessions of 'performance'. Obviously you could choose whether you did that for routes or bouldering.
I felt the SCC suggested that this sort of method might not bring you the big gains you could get from a periodised program, but could keep you going with little improvements throughout the year, which suits people who are weekend warriors - i.e. can't commit to only achieving goals in a particular time window.