I'm not really sure about cacheindvdplayer. There hasn't been any mention of it being required on OSMC which is using the same Kodi tree.
I don't have a PVR setup, and the cacheindvdplayer is gone in master.
Can anyone using PVR report if setting "<cacheindvdplayer>false</cacheindvdplayer>" makes live TV better/worse/same?