Evolving from a avr to an av processor. Benefit?

After upgrading to a great McIntosh multi ch amp and hi end speakers, I am considering upgrading a marantz avr to an av processor.  
Been told the avr is a weak link and there would be improvement in sound clarity, separation, etc. and maybe there would be.  Curious if others have seen discernible value when replacing an avr with an av processor.
All about feeling better about your components and trying to discern real value in making a hopefully near final step to a major upgrade cycle in home theater system.