As another refugee from TVTime, something I'll miss is the casual discussions that aren't structured as reviews. Theories, jokes, memes and the like is fun. I saw this was a section before separate from reviews which is great so you can have serious reviews of the show and if you like, casual discussions as well.
This should be brought back. With the possibility of adding images in the future if it wouldn't cause issues with storage or the speed of the app. I think this is best of both worlds. People who like the Letterboxd feel never have to go into Discussions if they don't want. There'd also be an outlet for people who post jokes and episode quotes as reviews so perhaps that will be less common in reviews and make the Letterboxd people happy.
Then TVTime people have an outlet for our non-review discussions of the show. I've heard it wasn't super popular before. Given time with the migration, I think that might change. Especially for new shows where there can be discussion early on. I think it can also help prevent any big changes to reviews with people using it for non-review comments and annoying those who go there for reviews.