I am a long time user of Lightroom and am quite frustrated as it does not really address the changed needs (due to new Technologies) of amateurs.
1) We do not just use "one" regular digital camera to take videos and photos, but also devices like Iphones, Go-Pros etc. // I would expect some "intelligence" to take the various folders, filetypes and mechanisms into account, without me having to think about the "perfect" directory order or switching between various apps to overcome shortcomings of Lightroom, Premiere & co.
2) Backup & Publishing - many of us have NAS Solutions in Place ( for Backup & as a Player) and OnlineAccounts (Amazon Drive - unlimited Foto/limited Video; OneDrive & Co). What I would expect of a catalog software like Lightroom are simple and best practices (!) to backup and publish (publish deltas) to all of the various solutions (e.g. with a good wizard, that e.g. even takes a limitations of the various free online solutions into account. E.g. that photos at Amazon Prime are free, but video storage is limited). I am so , checking forums for best practices - there is so much other stuff I still have to learn about Lightroom and Co.
3) Publishing in specific - when we publish (edited photos and non-edited) "we" do this not just to Facebook but also to our NAS e.g. for Playback on TV or to online services (with storage/folder restrictions) for various purposes. Of course, this could be done in Lightroom via Export. But this is a manual step and I am missing "best practices" and automatic delta publishing (e.g. all photos, which are edited to xx and yy).
4) 4k videos can not be played back in Lightroom, in which year are we living?
Just create a customer story for testing your solution approach: different devices (iPhones, GoPro other) in use, 4k and non 4k videos, different needs for Backups and Playback.