Firstly "classic" moniker with battery and J202 FET inside?
Unless I've misread the mini-pcb tracery , the boost switch is DPDT
using 2 seriesed switch actions for increased unreliability?
I would have paralleled for increased reliability of a simple switch
action if using a DPDT perhaps because it is more mechanically robust
than SPST or SPDT, or am I missing something?