Yes, here too.
I also seem to have been migrated as have my sharers (I think/hope)
I am having the same issue with subfolders, people cannot see some subfolders when they could before. I have reported this as a Feedback, no idea if that goes anywhere useful in Microsoft.
However, if you create a new top level folder, copy the old subfolders into that, and then of course go through the whole sharing process again, sharing the top level folder only, users can then see all the way down the folder chain. Or at least the few who have tested with me have.
NB: The sharing process has had some changes done to it and it is now IMHO about as intuitive as a rock.
And of course documentation is biased towards business users and not Family Subscription users, doc specific to subscription is always almost impossible to find
I am not a fan of links as they can be passed on, so I try to avoid using them. The new system appears to be desperate to create at least one link.
It also reports more links having been created in the "Details" view than when you actually click into the "Manage Access" dialog.
I am also now getting some VERY VERY ODD results when trying to remove old folders after copying contents into a new version of the top folder.
The new folder which I and another could see quite happily has disappeared from my "shared with" account but other can still see it.
It seems the cluster may be a little different now, but the F%$" is still the same.