Saw it this week in theatre, I'd rate it a little lower than NWH, they didn't do much justification for multiverse just teased it again as in NWH and the exploration was little than I expected, I feel like runtime was little rushed and the ending could have been more powerful. I'd rate it 8/10 or 4/5. I loved the horror & action elements, it definitely felt amazing, and was amazed that marvel actually did it, and disney approved something like this. Like Dr Strange 1, VFX team did great job, was happy seeing Sam Raimi again as director for a marvel film.
It had too many plot holes like what if, I loved how they showed Wanda OP, but wasted others for it, especially the Illuminati, I don't wanna be too critical, I loved the movie so much, first half was so good, most of the plot holes were in second half only, so second half could have been better, I hope they explain everything in Dr Strange 3. Thanks to Marvel for this amazing experience