Such a disappointing ending... even I would probably had done better.. it feels so rushed lately.
The ending would had been better if it was like, for example, we see who Tsuna be with in the end (Kyoko or Haru) but he was friendzoned...
Or a better one, that a timeskip past, (say, 10 years). He accepts his destiny as the 10th Vongola. We see everyone older, as the Boss and the Guardians, looking at the clear view of their hometown, on top of somewhere.
Would had been done better in numerous ways..