Actually, the consequences of being revived, the ability to kill another player, and perm death have been discussed a good deal, but this is one of the first times I've seen someone ask about removing the sisterhood entirely.
I for one would be fine with removing them.
Death has no meaning in our server. To most, at least. They've all seen or heard what the sisterhood does. Very few now even consider dieing to be a problem. It has made the ultimate deterrent into a non-existent one.
That's also without saying the ....interesting... logic behind why they revive and who they revive and when. But I'll leave all that aside since our lore is getting a decent overhaul sometime in the future so maybe they'll clean up this bit and if so there's not much point in describing why it doesn't really make a lot of sense.
On to Ghost's reasons for removal - Yes, I agree. A while back, there was a few steps taken to ensure death had meaning by way of pretty severe punishments, though you would still be revived. However, as with pretty much everything, the exodus has put that movement to a stop, for now. Really, I'd be in favor of either change, and probably more so your suggestion to remove them altogether, but I'll take what I can get.
I suppose this rambling post is here really to say, "Don't worry, after the exodus there will be changes in how being revived works. There will be consequences. People will take combat more seriously and much less often, or at least resort to nonlethal combat like actual people usually do."