AdminUI comes bundled with CiviCRM - when enabled, it does a pretty great job on most pages - but on groups - I hate it. (I do like the search functionality though)
- It ignores hierarchy (parents, sub parents, children, etc) are all mixed in together - We have about 20 active parent groups at any given time - with maybe 100 active groups total. Parent groups are helpful to be organized or to see all related groups in one place.
- When searching for parent groups - it searches for all groups - not just ones listed as parents (or those that have "children"). Users have to remember the exact name of the parent group.
It breaks breadcrumbs. CiviCRM > CiviCRM > FormBuilder > Edit Form > Manage Groups - though this seems to be an issue throughout AdminUI. TBH the original breadcrumb wasnt that useful anyways, (it was just CiviCRM) but at least it wasn't misleading.