C/C/R is basically what exists now. The C/R/FFA cycle was set up with the understanding that most FFA mobs would be going to class C. FFA was also meant to allow pugs to have access to raid mobs, which is incredibly unlikely given the FFA scene as it exists now, but it was a sticking point.
Most issues boil down to differing opinions as to why R and C exist. People either view them as:
- supporting different play styles; or
- segregation based on skill(immersion) i.e. a farm system.