Rich, new file and sharing experiences throughout Microsoft 365, now in Microsoft Teams

We're telling our users to sync the whole default doclib from teams, including all folders that might come from teams channels. Does the addition of the sync button here mean, that the whole doclib will be synced or will it only be for that one folder? If so, what happens, if you go in to another channel and want to sync that as well? As far as I can see, you can only sync one folder at a time from a doclib, which could turn this into a mess, because the OneDrive client doesn't remove unsynced folders. You'd risk ending up with a number of unsynced folders on your computer. On a related note: I was hoping it would become easy to move up a level from the current folder, connected to the channel you're currently looking at, but it doesn't seem like this is possible as of right now? Also: could we have the option to call it "Teams" or "SharePoint" instead of groups in Outlook? It's confusing enough for our users to have to deal with the former two concepts. We haven't introduced the concept of groups to them, so to them "Groups" would be a whole new thing (even though it is the same as sp/teams in the sense that you can see the files).