I reckon the switches are probably just on-off therefore no need for a kill switch. Lack of a volume control is my only issue but could learn to live without one.

Years ago I had a Jap Strat copy that was modded with 3 mini DPDT switches that were on-on-on and also kept the 3 knobs so that there was a volume for each PUP. In hindsight just one Vol would have been enough and there were lots of interesting sound combinations on offer mainly because I had early Bill Lawrence blade style PUP's that were like many of the similar mini humbucking ones you get today thus allowing series and parallel switching.