Dang, just hit me. I've never seen a series so low in their first year as long as Samurai 8 that hasn't gotten canceled. Last time a series did this to my knowledge was cross manage. Up to this point I've been optimistic, but I really don't see jump letting a failing series like Hachimaru take up a slot that could be filled by promising newbies.
Once these new series settle into place after their grace period, it should be interesting to see if samurai 8 is still given that taisei/beast/TTS buffer.
Tons since Cross Manage. Usually by vets.
Yui Kamui, Robot x Lazerbeam, Hungry Marie, Spring Weapon #1 (not by a vet, second chance rookie), Kagamigami, Illegal Rare, Soul Catcher(S) (not by a vet, second chance rookie).
There might be a couple others.
All the ones I mentioned except for RxL and SW#1 got cancelled around the same amount of chapters Samurai 8 is right now. Maybe like 10 more for Kagamigami I think, Soul Catcher(S) iirc actually made it a year.