I wonder how many Mexican ladies will no longer have a job in the wiring dept with the simplified Spike system.

They will probably move these ladies to other parts of the production lines.
Since they are going to 3 production lines instead of one, they will probably be hiring more people than retrenching.
Also, there's probably another 6 to 12 months left of producing titles like Star Trek, TWDead, Mustang and Metallica etc the older way which will need wiring harnesses.
Vault editions may have to be done the older way to use up existing parts that they have a lot of.
There was sometimes 3 or 4 women hovering over a playfield doing soldering as well. The wiring harness and soldering jobs will probably just move to doing something different. ?