I hope, for whatever psionic rework they have planned, that they're going to keep most of the themes they have (including the definitely-not-WH stuff), but added:
- The ability to opt out of a pact and not be drastically penalized.
- The ability to opt out of a Chosen One (or at least the Divine Sovereign portion) and not be drastically penalized.
For the former, there's already plenty of inspiration in the definitely-not-source-material: the Emperor of Man stands in stark contrast to the Chaos Gods. Lean into the Divine Sovereign as a replacement.
For the latter, you could either do something like the Mystical anomaly (you have a choice of investing the lacuna of psionic energy from that event into a single person to create a chosen one or to distribute it among your people) or build some kind of complete alternative that prevents the Divine Sovereign from being elevated (which also acts as a backup option if you don't get the Chosen One, through bad luck).
In fact, all the pieces for both are already there: if the Divine Sovereign and Pact were mutually exclusive (and the power level of both were higher), you'd get a setup much like in WH: your choices are making a pact for power with shadowy entities from the realm beyond mortal understanding, or elevating a champion to stand against them and using that to increase your power, free from their meddling.
It's very odd that the only option to be competitive is to somehow do
both. If they just gave Psionic ascension a big dollop of generic power, and made those two options mutually exclusive, I think it would be better off.
ex. Make Patrons not show up if you have Divine Sovereign. Make Divine Sovereign not show up if you have a patron. And give the psionic finisher a whopping +20% resources from jobs to psionic pops.
Patron-fans are left almost exactly where they were before (except with an extra councilor slot, and a weaker Sanctum). Divine-Sovereign-enjoyers don't get pact bonuses or penalties, but get something vaguely akin to Instrument of Desire instead (with a few extra % resources from jobs).
Of course, it would be
better to have something more in depth (Give the Divine Sovereign a pseudo-pact! Make the other pacts give their own civics, with their own thematically appropriate councilor position! Have the locus of power always make a chosen one, but have it create a Chosen of the X if you have a pact already!), but "make the two big power options mutually exclusive, and give a compensatory buff" gives the player a ton of flexibility.
That you have e.g. two "chosen" leaders (though they can potentially be the same leader) already sort of implies that they were, at one point, supposed to be mutually exclusive. Perhaps they decided that they couldn't get too close without GW sending them nastygrams, or they realized the power level was still too low, and found it easier to remove the mutual exclusivity than to build more stuff.