hmm I've never renamed any of my files and Kodi used to find most of them without issue Plex on the other hand as long as your folder structure is correct NameOfShow\Season#\episode then everything should be fine as long as the names are close its not 100% either (of course no scrapper is) but better than Kodi was at matching. Plexs main draw for me is the off LAN access to my media and the way I can turn off a video from my PC downstairs and continue it in any room on any device without any additional setup both of these functions can be added to Kodi but it takes work to do what Plex does automatically.