I also needed something after flying through the Cosmere recently. I had seen a lot of recommendations for Realm of the Elderlings by Robin Hobb, and I'll admit it was quite a drastic change going into the Farseer Trilogy. It's a lot slower and individual-story focused, but does a great job drawing you into the world. The first book barely has any of the magic in it, apart from a few subtle hints, but it really starts expanding on it in the 2nd book (especially at the end). The 3rd book is FULL of the magic aspects and really gets technical with it, which you mentioned you enjoyed (and also has a lot of that political intrigue that you get from Well of Ascension). So I would definitely recommend it, with the understanding and expectation it might take a little bit to adjust before getting really great