Why don't you like Kodi/Emby integration? I love that when I am on the road I can pickup exactly where I left off (using Emby in the browser), when at I home I only watch using Kodi.
As I recall, the only Emby/Kodi integration at the time (about 18 months ago) was pretty limited in scope. However, thanks to PlexKodiConnect, I'm able to integrate everything with all my Kodi customizations.
I use mobile all the time to watch stuff remotely with Plex, and sync that status across the devices in my network, and I love having the account integration so we can each have our own profile in the house.
What's funny is that, as I was trying to remember what Plex/Kodi integration I use, I discovered that PlexKodiConnect is actually a fork of Emby for Kodi. I'm not sure how I missed that the first time around, since that integration was really the big reason for going with Plex (and it turns out the feature was in Emby all along). I'm very happy with Plex, and I have no reason to change, but I probably would go to Emby (and recommend new people to go that way) thanks to what looks like feature parity with Plex right now (and it's open source!).