I don't know if you meant "exclude" rather than "eliminate", but to be clear Dolby upmixers have NEVER included Front Wide support. Back in the pre-Atmos days, Audyssey DSX and DTS Neo:X could upmix to front wides, but Dolby PLII never supported them (nor did DSU from the start). So this isn't a decision they are reversing.I always wondered what Dolby Labs was thinking by eliminating Front Wides from their upmixer.
The explanation provided was always something about not wanting to "tamper" with the integrity of the front soundstage by messing with the FR/FL mains. Who knows if that was sincere, but it looks like they are dropping their resistance and acceding to market pressure on this
TBH this is not something I've every worried about too much, DSU is so "ambient" with what it puts on the ceiling, it's not extracting discrete sounds like Neural:X, so you're not really getting much directional sense above you anyway (and your brain is going to be tricked by the directional cues in the ear level layer anyway). If all it's throwing up on the ceiling speakers is diffuse, decorrelated sounds, it doesn't feel like there's much need for more precise directionality.Now, if only they fixed Dolby Surround to have more than two height extraction "channels" spread across the ceiling.