From Part II of the “Precambrian House of Cards”:
Even Evans et al. (2021) themselves admit that “phylogenetic affinities for most of the Ediacara Biota remain enigmatic” and say that “Many Ediacara taxa may represent stem lineages of animal phyla but their diagnostic characters either were not preserved or had not yet evolved.” Hear, hear.Günter Bechly, “Ediacarans Are Not Animals” at Mind Matters News
The rest of Gunter Bechly’s series is here.
Maybe back then it just wasn’t as clear.