OF Thor temporally manipulated NYC to undo catastrophic damage. OF Thor just fought off an Elder God twice. And not an elder god in name only. But one directly connected to the Demiurge and arose along with Chthon, Set and and Gaea.
Is he going around busting galaxies? No. But that isn't really Thor's character in the first place with or without the OF. Otherwise he'd be reduced to a deus ex machina and sleeping 19 out of 20 issues.
Back on-topic of the thread though, it's a good question. The Uni-Mind represents the sum total psychic power of the Eternals. Sometimes less, sometimes more. And Zuras himself could arguably be considered a peer amongst skyfathers.
In concept, shouldn't the Uni-Mind surpass a single skyfather's power? I suppose that's the crux of the matter, has the Uni-Mind surpassed the Odinforce in on-panel feats?