I agree with your points ...this is the episode where dialogues were needed but they had no dialogues before or after any confession...that's why everything felt like rushed...but those scenes were beautifully portrayed by Maya-Wahaj..
I think I could always understand Sadaf..because in a relationship if one person is toxic and other person is a good person,than even the good person goes through negative emotions and becomes mentally unstable sometimes....that's what has happened with Sadaf.
In those post marriage scenes,if you look at Maya's eyes you can see the feeling of Sadaf getting healed,being loved and a sense of fulfillment because of being with a loving partner.
Maya-Usama scenes always had to be cringe and OTT because that’s how their emotions were for each other..not buildup on love and respect..but on blackmailing,lies,manipulations.
Everything makes sense why these things happened in the story but the problem is that overall script is so problematic.
Result was in front of us 
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