It's been a long while since I've read this manga but I remember that the first part of the manga was leaning towards Slice of Life/Comedy and only about 40 chapters or so did it become a full on Shounen Battle Manga.
I think the obvious thing is to make it a shounen battle manga on the get go with a heavy sprinkle of SoL/Comedy.
That's probably it. I remember it got kind of convuluted towards the end but I was a kid back then and maybe just didn't understood it that much.
Maybe lean more towards the vongola family story instead of whatever they did at the end?