While many fans were concerned if Rick and Morty Season 7 would succeed without Justin Roiland, it did perfectly fine. The new voice actors (Ian Cardoni and Harry Belden) completely nailed their respective characters, allowing the show to breathe once more and focus on Rick and his grandson's wacky cosmic adventures. The animated series gives them important quests once more, especially revolving around family.
Source:https://www.cbr.com/rick-and-morty-season-8-setup/