Airplay 2 multiple brand speakers streaming problems

One issue with Airplay 2, that remains unfixed, is when streaming (at least) audio to multiple brands of speakers, it cannot be done reliably. That is, the sound becomes skewed. For example, Sonos+HomePod won't work. Granted, Sonos has algorithms they use, it seems to me that the protocol for Airplay 2 should be a primary source of synchronization control?

I don't like being locked into one brand ecosystem; but this flaw prevents me from purchasing higher-end speakers; why bother when it can't be used reliably?

Anyone else have some insight into this?