hmmmm....
would you feel it was rushed if it ended with part one without a time skip?
personally I feel that the entire second half is unnecessary & while entertaining is no where near as good as the highschool arc
specially when it comes to exploring characters motives, also despite Ushio moving up as a pro the world started to feel smaller imo
and regarding why did Soma get the GIGA treatment instead of Sumo
they put main magazine stuff to GIGA so it would sell, Hinomaru have proved time and time again it can't move merch, with weak manga sales & weak anime sales, meanwhile Soma have lost some of its following but it still sell better
that's being said, they final volume isn't releasing any time soon, so there's time for them to tie up loose ends
and about the Kodansha comment, are suggesting that Shueisha was bad to Hinomaru Zumou?
the first chapter of Hinomaru ranked first in ToC, the first manga to do so since Eyeshield
during its 5 years run it was in the top with titles with the most amount of color pages every year
they kept it in the magazine for 28 volumes despite its sales which i believe makes it the longest running title with weak sales
for comparison series with similar sales like it (30k club)
Sesuji wo Pin lasted 10 volumes
Samon-kun lasted 10 volumes
Isobe Isobee lasted 16 volumes
even Psyren which sold better only lasted 16 volumes
lastly, Kodansha isn't innocent of rushing an MMA manga with weak sales out of the magazine
anyone remember this?
Unabara Domain—home to nightmarishly strong students and masters of martial arts of all kinds. The lord of the Unabara has decided that whichever of his sons discovers the strongest martial arts style will be his heir, but when 28th son Naoyoshi Washizu decides on Ogama-style practitioner Gama...
myanimelist.net
there's no reason to assume they would treat Hinomaru Sumo any differently