Roiland, whose exit from the Adult Swim series was announced in January in light of domestic abuse charges, had voiced the title characters since its 2013 launch.
Justin's humor was unique but was really dry when he was in his own. The other writers really brought his voice to life, IMHO. On that note, I think he was only a writer on one or two episodes of R&M.
Yeah I think if you only have to watch Solar Opposites to see that... his writing touch isn't really crucial to R&M! Good riddance! Someone else can make their mark with the voice acting!
Allegedly Roiland hasn't been very involved in the creative process of the show since season 2. He just mostly showed up to the record booth (like Family Guy's Seth MacFarlane).
Dan Harmon (the other co-creator and) and the remaining writting team were responsible for it.
Do you sit in the writer's room? What information do you have that contradicts what actual writers and actors on the show have said about Roiland's (lack of) involvement in later seasons?