I can only guess that since scrapers are highly dependent on the structure of the site, if the owners of the site change their architecture at all, it will break the scarpers.
As for your movies and TV shows, when you add the directories to your library, are you setting the type and meta data source properly?
For me, Plex is just amazing. I'm fairly new to it, so my love affair with it may fade over time, but it's outstanding. Nothing I found on the PC (eg. My Movies) could touch this.