Hello Wilson,
Good news: Nothing will change.
Based on what we know now about the new system, you will be able to submit a total of 30 Category C PDUs and the new system will then allow you to "divide those 30 PDUs into the 3 talent triangle categories. So for example, you submit a total of 30 out of which 12 are technical, 15 leadership and 3 Business and Strategy.
So don't submit them one by one. Submit them all at once with the appropriate distribution.