What are you doing, deleting tinfoil? Is it installed on your sysnand (emmc)? If it is, and you think deleting it before grabbing the firmware update will keep you out of trouble, you're sorely mistaken. If your switch isn't banned already, it'll likely get banned as soon as you try to connect to the eshop, if this is the situation. If it's not... there's still no reason to delete it, unless you just plain don't want to use it anymore. There are 3 options with the latest Atmosphere:
1)Grab a modified fusee, which has been linked to in a couple of different threads, I think.
2)Build it yourself, reverting the commit that removed IPS patching
3)Load package3 via hekate fss0.
With any of these options, it wouldn't hurt to use sys-patch as well.