I also use this a lot...
... but to be honest: I dont care, if a profile sound good, because it sounds good alone, or if it sounds good, becuase a good sound guy was able to set up an EQ correctly to e.g. compensate for the last bit of differenc eto the real amp or for whatever reason.
Sure: The strength of the kemper is to reacreate existing sounds. But you still can use it to make COMPLETELY new sounds. You will miss them, if you deactivate the - probably intentional - work on the profiles.
What I ALWAYS lock when comparimg is the reverb, however