People were suicide farming 100s of blood bags, so there was a buff that was added on death, that TFP didn't approve of, death should clear all buffs for consistency. Without that inconsistency they could farm all the blood bags they want for a one time maximum loss of 50% xp.
Furthermore, the large first aid kit violated one of 18's key principal designs which is all good crafts require a loot only trinket. As it was they were 100% farmable which also goes against everything we've done making odd loot only trinkets to craft anything decent.
More blood kits are in loot now, so it should be fine, just no endless best medical item in the game.