Played it. In terms of the Custodian teams prior work, this feels solidly okay-ish.
I have explored 9 or so Rifts so far.
... I think the way the infinity root Astral rift is written the scientist in charge comes off as a pyromaniac.
(Not burning the roots got me a relic that lets me spawn a free leader that doesn't count against the cap.)
Also, the rift that sees you back to the Grunur bombardment of Baol, if you meet with the Grunur you get access to flametrooper armies that do 500% collateral damage. Someone on the writing team likes fire.
... also my galaxy in flames. I decided to deal with the Fanatic Purifiers on the far side of a wormhole, which let me capture an L gate.
My neighbor with which I had a defensive pact picked that time to have a Determined Exterminator pop up and all but wipe them out (I am waiting for them to be gone to take over territory, but details).
L gate had grey tempest, so that is happening.
And around all that time I got the Riftwalker origins Formless rift pop up so I have an unexplored wormhole in my home system with an advise to explore it with strong fleets.
It is past midgame and I border a marauder, the Materialist and Spiritualist FEs, I have a Chosen Emperor and a Chosen minister of defense.
... I may need to redesign my battleships to not use so much archaeotech, so I can actually use my alloy stockpile.