I can try to answer your question.

1 - In the first release all the code was in the qbw instance cmd. As the code was a bit large there where some doubts that qbw could handle that properly. In this new release most part of the code is in a separate file so the code in qbw instance cmd is mush smaller.
2- This new version also handles timer refresh in a smart way. If the phone is locked there is no need for timer updates and so there will be less battery drain.
3- As asked by some occp users (myself included) in this new version the frequencies only change in temperature mode. If the chosen profile is stock or ideal there will be no change in frequencies even if the phone is locked.