From what I've seen so far:
1. The ability to switch companions without having to dismiss them is such a QoL improvement! I adore Astarion's line and grumpy face when he's dismissed.
https://www.youtube.com/shorts/rhq7iHKmOms2. I love the fact that Shadowheart can now be hugged too! I so wanted to do that in my game and she deserved it.
3. Keeping the Githyanki egg is now a legit option, and it is talked about in act 3, and we can even jokingly call our companion "Mommy Lae'zel".
Video for reference in the spoiler.
4. The new Nightsong vs Lorroakan scene is also much cooler now!
5. Minthara finally has proper kisses and it's easier to recruit her. She also doesn't share her tent with Halsin anymore.
6. After reading the discussion about the super cringy conversation between Gale and the twins I'm also happy it was improved.
7. Gale's proposal scene is much better now.
8. The new animations for the epilogue where we finally see some intimacy between Tav and our LI.
9. Leaving together with Lae'zel even if you're not a Githyanki yourself. Would be cool if it was a friendly and not only romance specific option too, like with Karlach.
10. Being able to tell Lae'zel to make the decision herself after the final battle. (Wyll needs these options too)
