- invitations always lost in the ether. Like always.
- no way to prevent adding duplicate photos into an album
- no like/comment notifications (I checked, the setting is on
- no way to let others invite more people to the album
- default sort is by added date… I can kinda see this but really any time after first viewing the pics you want them chronologically
- no iCloud.com support. I guess I should expect this, I’m not sure what iCloud.com is even for lol
iCloud Photos (including shared albums) really could use some quality of life improvements. My biggest and longest running gripe is that smart albums on Mac don’t sync to iOS. I also experience much of what you’ve listed here, in particular the invites disappearing into the ether, needing to be canceled and resent multiple times.