I find that following updates on the Google group is not at all convenient, and it is really hard to look for things specific to (for example) a particular homework question. I spoke to a couple of other students in the class and we all have had pretty good experiences using Piazza (
https://piazza.com/) as an online class forum - it differentiates instructors' responses from students' responses, allows easy searching for a specific topic and just makes everything easier.
I would like to suggest using Piazza instead of the Google group - what do the students and instructors think about switching?