If you’re asking about using the ReSound TV Streamer 2 with the Quattro’s, my experience has been different from yours.
The devil can be in the details so more details about how yours is set up might help figure out what’s going on.
I had a “control” as my Sony TV was already set up to pass through all its audio output to my Yamaha ampifier and speaker system via a TOSLINK optical cable and that was working fine.
To insert the ReSound TV Streamer 2 into the works, I purchased a POWERED TOSLINK optical splitter on Amazon: https://www.amazon.com/gp/product/B00HQ2R314/ plus another TOSLINK cable (the TV Streamer 2 comes with one).
I also found that my original TOSLINK cable from TV to amplifier was probably too long and had some tight bends in it was initially set up. After I straightened out the cable bends, sound output quality to the speaker system improved tremendously. Does It Make Much Difference What Type of Audio Output Is Used for TV Streaming? - Analog vs. Coaxial vs. TOSLINK S/PDIF?
I haven’t paid careful attention to left/right difference in streaming TV/media center output directly to my HA’s but the sound seems balanced, right in the center of my head. And the sound quality via direct streaming is great. Our TV is in a very large, two-story high family room so I think sound out of the speakers must have a lot of room reverberations but sound streamed directly to the HA’s is very crisp and clear, speech highly intelligible for me. My audi set my volume a little on the high side and the sound being streamed from the TV is so loud, I have to turn it down a couple of notches. Since sound via HDMI input passes directly out of our TV, the TV volume control does nothing to control sound output to my ears. I let my wife fiddle with the Yamaha amplifier control to her liking and I control direct streaming volume and speaker volume pickup to my external HA mics via the separate Streaming and Surroundings controls in the ReSound Smart 3D phone app.
If my experience with the ReSound streamer can be generalized to other HA’s, for other folks in general, if you watch a bunch of TV, I highly recommend getting a streamer compatible with your HA brand as I find the sound quality of both Blu-ray discs and OTA digital TV broadcasts a lot better through streaming than listening through the speaker system hooked up to the TV. A slight disadvantage to streaming with my setup is my HA’s only get the sound in stereo so I lose some of the sound spatiality I might get in listening to Dolby 5:1 sound (or better) through our speaker system-and if I want to try to recoup that by also listening with my external HA mics to the speaker sounds, I probably want to go into omnidirectional listening mode for the HA external mics, which I haven’t been doing so far (more pickup of room noise, too, like the AC or heater kicking on during a show, too, probably!).