The latter. Apparentely it is gotten too long for the author to continue and they are having a hard time of trying to bring out chapters and juggle other things. This means however that project horizons will probably end with one of these possible events. 1. A cop out or something like that. 2. Blackjack is killed and STAYS dead. OR 3. We find out she had dreamnt the whole thing as she has been in lets say a coma.
I think that last one would rustle everyones jimmies.
Yeah the stories are getting really long winded. Honestley I bet that whenever sombra claims a chapter had been condensed from 3 is probably a lie they are probably originally half the chapter they are.