Make this text more coherent:
Heseltine was quite ruthless about moving civil servants with whom he was dissatisfied. Nonetheless staff thought Heseltine had mellowed somewhat since the early 1970s, and was more relaxed and fun to work with.
Heseltine was quite ruthless about moving civil servants with whom he was dissatisfied, but nonetheless staff thought he had mellowed somewhat since the early 1970s, and was more relaxed and fun to work with.