my guess is that if you are asking if you need more utilities, it is because you suspect you do
you seem to have a decent selection of utility modules already - what do you run out of? or wish you had more of?
what do you think you would use most?
what are you reaching for when you are patching, that isn't there?
what can you not do that you want to do with the modules you have?
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities