If you edit the signal name in one place it would change the name on all wires in the same circuit.
It would simplify editing, specially when copying or changing stuff.
It should maybe be a setting to turn it on/off if the signal name was used in a different manner.
I agree, it does make sense. I also thought it would be useful that when you tag one wire the software could walk around every other wire (through inlines and splices) tagging every wire as it goes.
Again I'd log this as an Enhancement (by raising a Support Request).