[jhanschoo]

What quickly comes to mind is the removal of term limits (detriment to China, favorable to Xi). There are lots of things that China has done since Xi that are bad for foreign diplomacy that makes neighbors nervous, which seems like a detriment in the long run, though it's hard to say. Some examples: (more hostile climate to foreign businesses, claiming the south china sea, cyberespionage, oppression in xinjiang)