You have hit on an important issue. I will try to explain all of this as simply as possible.
Earlier, I explained that Louis Braille had suggested a way of writing the number 12. The standardized code is now suggesting another way of writing this number. As an example, it's as if we were now suggesting that you use Roman numerals rather than the Arabic figures that you have been used to seeing in any book. You would immediately try to ascertain why we wanted to make this change and why it was advantageous.
This question was dealt with earlier. We wanted to standardize our braille with that of France, something that Quebec had never done beforehand. Quebec had never changed its way of writing numbers, we were still using the numbers that had been suggested by Louis Braille. Moreover, these same numbers are used throughout Canada, including in anglophone communities and in the United States. From now on, in Quebec and only in Quebec, figures will be written differently. Consequently, a child from New Brunswick or Manitoba who has not learned the new numbers may find himself trying to read a document which, in many cases, may be illegible to him.
To conclude, I would draw your attention to the fact that there are not many numbers, they go from 0 to 9. But that is not what is complicated. If you change the figures, you're also going to change the mathematical and scientific codes. You will no longer be writing "12 + 14" in the same way, because the addition sign has changed its code as well.
I do not want to give you a lesson, but I can simply explain that the code, which will have a Quebec version, will marginalize much more than it will standardize.