My opinions on Raw Chicken:
I personally never eat it in MCSG, even if I am desperately hungry, because it has the chance of getting sick, which in return just makes your already bad hunger situation even worse. Raw Chicken is one of the more useless items, unless you can cook it, but most players don't really want to go through the hassle, when you can get cooked chicken from chests.
I believe that it should be removed from 24 servers, where the maps are small, and there aren't really many furnaces, and it is PvP focused. On 48 player servers however, it is still a viable food option because there are generally more "survival" type elements within those games, because of bigger map size, and also more spread between chests.
Many new players weren't around when it was a viable option, so yes, to answer your question, I do believe that MCSG is still MCSG without Raw Chicken, at least on the 24 player servers. It's like Bone, or String, not really that important but there anyways (Bone and String were removed).