I admire. Under him the show took a harder science-fiction edge which is preferable to the light, celebrity-orientated entertainment under RTD.
JNT was also critized for bringing in big name guest stars and that hard edged science ficiton ended when Bidmead left teh show IMO.
JNT and RTD both appointed Doctors (rather than audition) cast a former child star/singer as companion, and saw the advantage of stunt casting guest roles. It's weird how it all worked for the later.
The difference being that RTD is a writer while JNT was a mere bean counter. IMO JNT should've left when Peter Davison left after that he really had no vision for the show and he did try to leave.