I guess the non rolling belt is a lot like the "technical" route to belts in Judo.
The British Judo Association (BJA) newer approach to grading.
The BJA give two options to people want to grade in Judo, the "technical route" which people can get through a technical examination and is judged on a persons technical ability performing an extensive syllabus of techniques and kata's of a series of techniques.
The other route, is the competitive route, where an individual can get belts by collecting points by winning fights at competition or at a sport style competitive grading.
In order to get points, a player must have to score points against other players who are at least the same belt level as them.
I believe that the technical route was developed in order to make the sport more appealing to folk who aren't interested or have other obstacles to competing (age, location, injury, health conditions, lack of ambition).
People still participate in Randori in their clubs regardless as to whether they are competitive players or recreational players.
Personally, I am not a big fan of the technical belt route.
Someone who has never had a fight in competition can now in theory can grade to 5th Dan, and the technical Dan belts look the same as the competitive Dan Grades.
One problem that can arise with the technical Dan grade is that the players who aren't any good at fighting
can have much higher grade than a player who can beat them in Randori, who may have chosen not to do technical belts, or who is newer and has less years on the Judo clock, but perhaps more years in fighting experience.
This can cause major problems with hierarchy within the club, as the higher technical Dan people start to believe their ego, that they are technically better, and so sometimes end up bossing around or even bullying players who are better. I think some treat Grades like Army rank.
Personally, I think that for those who are doing Judo from a more Japanese "self perfectionist" mindset, I think that the technical perfection can be a worthwhile endeavour, however, in some cases, the people grading aren't always very strict with regards to grading people, due to the sport emphasis, and some of the players, will try and get technical grades with poorly practised alternative versions of the techniques in the syllabus, which may be fine for use in competition, but personally i think should be disallowed in technical gradings unless there is a really significant reason (such as major injury or disability).
But I guess that is one of the conflicting issues in competitive martial arts, sports men want to win medals, get belts for ego and some don't care how they get them. Where as those who follow a more Japanese Mindset, will want to train hard to perfect their technique, and not look for shortcuts or cheats to get belts, as to do so would show a bad spirit. Not saying people shouldn't use variations for techniques in competition, sure. after all, that is how sports evolve and thrive. But think that if a technical grading system is going to be worth anything, standards need to be established and kept, otherwise, you end up with loads of people with high belts and a poor quality level.
As for the Torrance thing
Course, their belt system is not equal to the belt standards at live comp clubs.
But I guess, for those, for what ever reason can't train at such a club,
it does give such people a way to achieve some understanding, prior to attending a
good club.