I like that idea.
My take on it (why I didn't bother watching any of these): too many series, too obvious that they're building a big canon they can mine for all kinds of shit, too many humans in big-fucked-up-head makeup.
In an entirely different series universe, The Twilight Zone distinguished itself from The Outer Limits by declaring that it was "Not a monster show". A bunch of big-fucked-up-head make up doesn't substitute for story and characters. In fact, I think it can impede.
Yes, Star Trek TOS pilot had the big butt-headed aliens, and there were others over the years, but even by TNG, the Klingon makeup was over the top. TOS did a lot with a little.
I'm hugely open to the idea that other life forms might not share our morphology. So why do they all look like humans with big fucked-up heads? Project Hail Mary did a great job with Rocky (a practical effect, not CGI by the way!) If you're gonna seek out new life and new civilizations, howsabout boldly going where no costume shop and makeup department have gone before?
Canon-wise, there ought to be one story through-line, not a Coca-Cola-like line extension (Caffiene-Free Cherry Diet Coke...). Make it comprehensible.