I dunno if your understanding matches up with that of Rome. Pope John Paul II said in the introduction of the CCC:
The CCC is an assisting tool for local Catechisms, not the universal replacement to which local Catechisms may or may not be added. It has a decidedly Latin approach, though it tries harder than previous catechisms to be mindful in expressing things in a more universal manner. Any Catholic is welcome to use the CCC (I personally LOVE it), but it’s not the end-all and be-all of Catechisms. It is an effort by Rome to initiate a catechetical renewal in the Church, and it expresses the Faith in a mostly Latin manner in order to do so.
To write a Catechism that could touch on all the Catholic theological approaches, even the different ones WITHIN the Latin tradition, and still remain accessible to even the moderately educated would be a nearly impossible task, IMO. Better to stick with a multiplicity of local catechisms, while maintaining an intention of unity in Faith, and that’s precisely what the stated goal of the CCC is, namely to get the ball rolling in that direction.
Peace and God bless!