Better interface with PLEX
Not exactly sure what you mean, but the Plex plugin is quite full featured.
I agree with James. I fiddled with it for a bit got to the multi-user setup and stopped and uninstalled. Looking into Trakt started as an interesting method for notification of something downloading. As a new user I don't really grasp the benefits of Trakt. I wanted to give it a try because it was interesting. I first tried to set it up with Sickbeard but found that the original API was abandoned and that it looks like that isn't working. I find that it's on Plex but it was not as straight forward to setup as I'd have like especially since I don't know that it will work out of the box, and that I don't know if it provides tangible benefits for my setup. It'd be great to get integration on Plex's side but I understand it's out of your control. I might come back to this project in a few months and see if things have changed.