It's a far cry from the "perfect organism" of 1979, the sleek, rigorously symmetrical killing machine designed by Master Giger. Seems like Master Ridley has decided to tread the grotesque territory of "Alien Ressurection" and its insultingly grandguignolesque Newborn. Failed experiments by David ? So he'd really be a modern Prometheus then. I also can't help feeling that the "hero" creature is going to look way more complex than the glimpse we are offered here.
Coincidentally, I am currently reading Greg Bear's "Eon", a hard sci-fi classic that had been sitting in my bookshelf for decades and the term "Neomorph" is used in there, along with the word "Homorph". Could it be the source of that neologism ? Maybe not, it's quite easy to coin for someone with a modicum of knowledge of the Latin language and according to me it's a sign of Scott's resolve to be done once and for all with the Xeno's "traditional" aspect, and impose a new shape. Easier said than done.
As for subtlety... If Covenant is mean, sick, outrageously violent and gory, harrowing and nerve-wracking, with Scott back in visionary mode, as it promises to be so far, I couldn't be more satisfied.