For independent reasons, I was looking recently for cards that interact with Sacrificing. At the time (owing mostly to my lack of knowledge in MtG templating), I found none. Looking at the Avacyn restored preview card Sigarda, Host of Herons brought back the question, which was further piqued when I noticed that another preview cards is intended to "mess with" sacrificing (Angel of Jubilation).
Looking through Gatherer (with the above caveat), I found only a few cards cards (Sigarda's predecessor Tajuru Preserver, Dragon Appeasement, Furnace Celebration, Savra, Queen of the Golgari, Mortician Beetle, Thraximundar) with sacrifice trigger effects. I found no card with trigger effects when they are sacrificed to other cards (something which, coming fro a YGO background, I am used to).
Was my research too incomplete or are there really just few cards that interact with Sacrificing other than as a cost or effect?
If there are so few, do you see any design-related reason for it? I mean, given the prevalence of effects triggering by entering the battlefield, drawing cards, creatures dying, attacking, blocking/being blocked etc., it seems strange that such a prevalent game action as sacrificing would have been ignored.