IMHO, Glenn Grue did a great job after David left. Classe was still a viable company for many years after.
I do believe that some of the best designs were early on and Classe never really saw it's own potential.
At the time, the DR3VHC amp, DR8 amp, DR9 amp and the DR6 preamp were some of the best sounding gear you could buy. Not only good, but some would consider state-of-the-art for the time.
Sorry to see them go...