You can convert dual-layer profile 7 mel uhd bluray to single layer profile 8. You don't lose any quality and there's a benefit in doing that when you use a sony x700 bluray player.
P8 is actually the profile I use for all the MEL DV bluray because the x700 doesnt have the green screen bug with profile 8.
so here's how I watch DV movies on the x700
FEL P7 : remuxed to AVCHD bluray folder structure
MEL P7: converted to single layer profile 8 TS
*ts p8 playback will still have seeking issues with long movies and no automatic forced subtitles though.