The realiser does do the center correctly if you are using a 4.0 speaker setup with a 5.1 signal. I haven't tested whether the LFE mixes to the front large speakers though since I don't have a way to easily test that. I thought the +10db LFE cannot be detected by an AVR and is there because a movie may or may not be mixed correctly in the LFE channel for that. There is no signal for it and users have to lookup how the movie was set and choose the right setting. So it was on a movie by movie basis and whether it was DTS or Dolby or both, I cannot remmeber. It may be the oppo making the mistake to put the rear channel on the left back channel, since you've decoded to PCM the realiser is going to take it as is. This is the situation I would hope the realiser correctly pushes to both rear channels. You'll have to wait until DTS decoding is enabled to see.