About the possible future new firmware...if there'll ever be a future new firmware
1.FWD, REV buttons won't work on audio files (flac, wav, mp3)
2.Zoom is having too large increments ... would be nice if it may incrementally increase and decrease horizontally and vertically and also re-position the image up and down incrementally (in order to view the subtitles below a 16:9 image instead over it). Zoom is not working while picture is set to any other selection other than "Auto"... (there are custom UHD Auto, and Source Direct - on these zoom is not working)
3.Font size needs more increments for getting shrinker (I have a very large screen)
4.Subtitles should have a seeting for allowing direct external subtitles adding instead of implicit internal selection... which always made me select and search until the end of the list, and on the last position of the list, the external subtitle can be added. Please make THIS subtitle as first to be selected automatically and let the user choose otherwise.
5.Volume is not operating on HDMI output ... but other players don't have this problem... so, for volume I must switch the remote controls and use alwasy the TV remote for volume and the Oppo remote for playing functions.
6.Sharp, Contrast, Luminosity seems to have no effect from the button...no matter the settings of the picture (auto, custom UHD, or Source Direct)
I am not sure if the software might fix all these issues or the hardware has limits... but it would be nice