There have definitely been issues with the navi 31 cards in VR, and I haven’t seen any confirmation of them being ironed out. If you check out any of the results for VR games in this review (The Hellhound RX 7900 XTX Takes on the RTX 4080 with 50 VR & PC Games – BabelTechReviews), you can see how the 7900xtx is not only significantly slower than the 4080 which it would normally tie or beat in flat screen games, but the frame time plots are much less consistent.
As for whether the card is “worth it” over the igpu, I think that even if it isn’t a sensational performance uplift, it does cross an important threshold where 1080p gaming in modern titles is easy with just a bit of tweaking vs being greatly compromised, or locked to 30fps on the igpu.