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#11
Please note that the tutorials here covering relocating these folders include, on my suggestion if i recall, that a disk image/system image be created before undertaking this hazardous action.
I note that you wish to avoid a clean install.
Are you therefore using disk imaging regularly and routinely so as to try to avoid doing that when things go wrong- as they will?
Put another way, what precautions have you put in place so you don't have to do a clean install should your system disk fail or an unecoverable problem arise?
Personally I'd never move those. I'd create my own, free of any folders created by 3rd party programs when they are installed, and allocate them to libraries as I wished.
As for customisations- ensure what you choose to do is readily reproducible, documented, and will withstand an upgrade or an in-place upgrade repair install (same 'mechanism') - or can readily be reapplied.