Katekyo hitman reborn is a very underrated manga and anime series and i believe fans were disappointed by its abrupt ending we know there was so much more content that could have been added, so many more arcs we could have enjoyed. i personally believe that if this manga was given the support that others like naruto and one piece received it would have definitely been counted amongst the greatest manga of all time. so it would be best if the manga was restarted exactly as it was before but instead of the 2 last arcs it would explore more parts of the world of Vongola with the last two arcs sprinkled in somewhere so that the general theme of the manga wont be lost. alternatively it could simply continue with the story of reborn making Tsuna Vongola primo the second. I know there are many more important things going on in the world that need peoples attention but i beg of you to take a second to help a disappointed fandom out.