I play with 2 groups and one group does a main campaign and then smaller campaigns every n weeks so that way the DM has time to prep, adjust plans, and it’s lower stakes if someone misses. Add in the occasional one shot or two and you churn through the interesting subclasses quickly.
Looks like no new subclasses based on the description. Nor are there any races listed (what’s the new term? ancestry? Species?) so this feels lacking in the character options as well. Maybe that bodes well for the setting materials?