2004 Grand Cherokee - Driver's Door Wiring Problem

Recently discovered what may turn up to be a long term problem with
the wiring going to the driver's door. Ground wire is heavier guage
than expected (12 ga stranded), most other wires in harness are 16 ga;
unusually stiff for this type of application. Due to frequent flexing
opening/closing door, caused wire to fatigue and fail.

Results/symptoms:
Initially, door controls function sporadically (door locks won't work
with door open, but work with door partially closed).

Longer term results - ground wire and insulation breaks completely.
All door controls from driver's door not functioning:
Remote mirrors don't work
Power windows won't work (from driver's control)
Power windows won't work (from any control; groun also effects lock-
out button)
Power lock won't work from driver's control
Driver's door won't respond to remote (must manually lock/unlock
driver's door)

Not a big problem to repair the break, but have concerns that stiff
wire will continue to be a problem 'long term'. This took three years
to surface - don't know how long until the splice or adjacent portion
of the wire fatigues & fails.