I have to agree with musicmaker. As I recall there was a plan to drop nfactor back to n11 - this was still a good era for all the miners.
I have a feeling that (almost) all non-Chinese people are a bit scared of Chacha with nfactors switching. So, drop nfactor, keep it for a long time, invite miners

Lowering nfactor is quite good once you cofigure your miner. You can mine the same amount of coins but with lower power usage. Switching the nfactor back isn't so simple devs said.