Like title says. They both make it possible for players of severely inferior skill level to survive MUCH longer then they are supposed to. Major Vitality uptime cannot be that consistent from any other source in the game, and the same goes with Major Protection especially with the (rightful) Pirate and Steadfast nerfs.
It honestly baffles me how these two obviously over-performing weapons have still been untouched. Every good player understands they are over-performing and you can do perfectly fine without them, but with them you become virtually unkillable. Furthermore, with the buffs to healing, Lokestiiz HM has become much easier to heal, to the point where BRP resto is absolutely not needed anymore to successfully heal cages. There is no legitimate reason for these to not get nerfed ZOS.