I think your question above is a pretty strange one: will carriers continue to be nerfed, and how can this be justified if CCP raises prices again?
Given the nerfs that have been applied already, and the furore over the just-announced price rise, I’m pretty confident in stating that further nerfs to carriers or sub price rises are a ways off in the distance.
If you’re looking for some blanket statement that there will be no changes in these areas for the next X number of years, you won’t get it - who could say that?