I agree with Ivan. Because of the way ebonite is put together it's unlikely to ever spread, split or shear. If it plays fine then it will be fine.
Chips that go into the tip can cause playing problems, those on the outside tend not to. As long as yours plays OK then you've got away with it. It would be really easy to make a smart arse comment about not dropping mouthpieces, but its so easy to do. I once dropped a Guardala mouthpiece while playing in the kitchen, which had a tiled floor. Mouthpiece slipped out of my hand, tip first and hurtled downwards. It was fine, as it missed the floor and landed pointy side down on my bare foot. It took at least an hour before I was sure the thing hadn't broken a metatarsal......