I find the grave situation to be completely absurd. For those not familiar, it is the argument that grave stones will not be blessed because people will steal your money. I'm not sure what's wrong with that even though it was exactly the same but there wasn't a 6-minute grace period for picking your possessions.
One argument that has been discussed is that the emergence of new bosses requires graves, does it? Are you seriously? Tormented Demons was an incoming boss in 08 and I'm not aware of any. However, when I duo me with my partner, I bless him (well I bless him, but and he's not yet dead). I am able to return in less than 3 minutes. The whole gravestone blessing argument is nonsense in this case, it doesn't matter if your gravestone is blessed or not, you can still get back.
The Corpreal Beast, on the other hand, has been deliberately designed to not use the mechanics of a cemetery. I'm certain Jagex noticed it and was ashamed at the ca