Let's be completely honest. The show had way more issues than just being CGI. Incoherrant storyboarding, poor sound design, plot being inconsistent across dubs, story beats being told out of order and even mashed together, and a director who's way more suited to directing comedy and slice of life. Also I hate that CGI in anime is automatically synonymous with "bad animation". Just look at JoJo's Bizarre Adventure and Knighs of Sidonia. Hell, look at the cutscenes for Guilty Gear Strive. CGI isn't bad, Bad CGI is bad.