Will the /echo actually adjust the settings though? I always use /dpson 0/1/2 and /buffson 0/1, /mezon 0/1/2, etc.
As for enabling/disabling certain buffs/nukes/debuffs, I don't believe that's currently supported. It's an all or nothing toggle for the section. It would be nice to be able to turn on/off my chanter's nukes and such while leaving his debuffs active all the time. Perhaps one day.