Originally Posted by brunos

Irt is clear that one of the objective of this TP change is to penalize flying on partner airlines.
For example CX has 5 daily HKG flights , while BA only one.
Both used to earn the same TPs or 320 per round trip in Business. Hence 2 RT were sufficient for silver.

Now CX will earn only 1,500 TPs in the I&P buckets (my usual), so needs 5 RT.Taking a typical (rather low 4,000 fare on BA, PE or Biz, you earn 4,000TP per RT. Hence need 2RT for silver.

The new structure also makes it much much less attractive for EU based members. No time to elaborate.