As a living liver donor myself, I think it is not exactly the same size, it is more like the functionally healthy state and the liver remains a bit smaller than the original size AFAIK.
Well I had my lungs collapsed after the surgery as my diaphragm or chest wall---I don't know which---was accidentally punctured, but was mostly okay except for that. It took me about 5--6 months to fully recover, including the aforementioned lung collapse. It was 2008 so such accidents are presumably rarer nowadays.
