Well it looks like the power wire runs through the grill so you do need the disconnect to remove the grille, if I am looking at it right.
As far as the power interrupt, I have one since I heard some kids spooled out some guys winch, threw it over the roof, attached it to the rear bumper, and then did something ugly. And I wired it to switched power.
However, I live in FL and am not into mud so I haven't field tested it yet doing a recovery. I have only wheeled twice in WV (on vacay) and didn't need it either time. I did test it after install and all was good.
2014JK,auto,MC GCL 2.5",35x12.5x17, 4.56s.
My observations are based on my experiences...YMMV.