Efforts of most of the blocks mined in the communitypool are terribly high and
therefore not profitable. We should use another pools.

Of course yes. However GPU mining can gets more coins.

The problem is that devs does not have enough skill and knowledge to fix bugs of the source code
and does not have enough skill and knowledge of network and cryptocoin.
Too low level...
Stop copy and paste, and study harder, devs. Otherwise, stop the project. That is best for you.

Ban nicehash. That is the best and easy.