Out of curiosity, why add Block O' Bones? There are plenty of dedicated mods out there that do similar (Mincraft Graves, Lootable Bodies, Open Grave, BaM's Grave, TwoGraves). It's nice that you can disable it and all, but it just feels really out of place to include such a generalized gameplay-affecting thing by default in a mod that I would rather be secluded to its own dimension.
It's more unique in that it includes a compass, but I'd rather that be standalone too so people that would want something like that wouldn't have to install an entire dimension mod just to get its functionality.
On a side note, instead of leaving that compass around, why not have the compass itself act like a sort of key that you need to use on the grave that returns your items and destroys the compass? I tend to prefer against free things, even if it's as small as a single bonemeal.
I hate to sound so critical. I actually love the Erebus mod otherwise.