I love Plex and use it semi-casually on my iPad and Amazon Fire TV. It's a nice way to view videos on my media PC (a NUC model) or my NAS, and I love it...but there are some serious UI issues that also make it frustrating to you.
1: Able to view by folder but not sort folders by last-modified.
While I sometimes watch movies, more often I'm watching episodes of anime in folders, and the current UI is really hard to use. On a Mac or PC I can sort the folders by "last modified date," so that any folder that has had something added recently will be at the top. This is super easy, but not something Plex seems to be able to do.
Having the ability to sort folders in folder view by last activity would be a bug UI improvement. Alternately, having links to other episodes in the series (e.g. if episode 8 of One Punch Man showed all the other episodes and showed them, rather than making you search for them squinting), that would be good.
2: No visual feedback for folders.
If I view all episode of anime in Recently Added format, I get a huge jumble of episodes at once, but at least they have pretty icons. There are no icons for folders. I think the icon of the first episode in that folder should be chosen and added to the folder.
3: Text titles should be handled in a "smart" way.
In 2016, people download files with filenames like
[Underwater] KILL la KILL 23 - Imitation Gold (TV 720p) [85D1F93F].mkv
[Leopard Raws] KILL la KILL 21 - Incomplete (TV 720p) [6F8EFD16].mkv
I believe Plex should, perhaps optionally, have the intelligence to strip out anything that's clearly not important from a title, like things in [brackets]. Among other things, it's totally impossible to read any title in Plex, and I'm forced (on Amazon TV anyway) to read while it slowly scrolls the long title, rather than having pre-truncated it nicely for me.
Similarly, Plex isn't smart enough to sort things for me if the filenames are not in order. I think it should know that anything with KILL la KILL and 08 in the title is probably episode 8, and KILL la KILL 09 is probably episode 9. Having true intelligence added to Plex would be ever so wonderful.
It's great to see Plex taking off so well on so many platforms. I hope to see these minor frustrations someday be addressed. If there's a better way to submit these suggestions to the company, or if there are options I don't know about, please tell me!
I can't see how to upload images here so I've posted some screenshots on my own server.
Example of folders that are sad because they have no icons
Example of a horrible (to my mind) mess of videos shown sorted by date added, with no grouping
Example of useless titles which have [bracketed text] in front of them and aren't even in proper episode order.