there is no right or wrong way to do things... but you can learn from others experience and advice...
more utilities will give you more possibilities, but I'm not sure I'd necessarily remove stuff... I'd add more rack space, probably at least another 6u 84hp or 104hp - to house more utilities, modulation and filters - there's a lot of sound sources and effects modules in there and not a lot of modulation and utilities - which I'd want more of (and tbh will give you exponentially more versatility in patching than you currently have)
I'd consider swapping the erica dsp for an fx aid pro though - again more versatility - but I'd much rather have more filters, mixers (sub with offsets and matrix), vcas, etc etc etc - see my signature for hints...
"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