Shared earth messy wiring

[dan28]

On the dtr 125 the shared earth spiders Web of wires is making my loom messy 

Would it do any harm if I cut up the shared earth wire so it works something like cdi a regulator earth to battery 

.rear indicators taillight earth to frame 

Headlight an front indicators earth to frame 

I m confused about the ignition it has more than one black wire