Today, I caught the Saturday replays of the week's episodes, and saw Ravan, Vibhishan & Kumbhakarna receive their boons.
They've not put much thought into Kumbhakarna. He was a giant - far bigger than Ravan or Vibhishan. Instead, they showed him as the same size as Vibhishan.
One thing here - unlike in Ramayans, where Vibhishan looks like a noble character, they made him look like an absolute runt. Same for Kumbhakarna.
Also, Kumbhakarna fell asleep as soon as he received his boon, and Ravan and Vibhishan had to carry him home.
I do hope that in this serial, they show Kumbhakarna's marriage to Karkati as well. In the AS Ramayan, they showed it after Rama's return to Ayodhya. Reason I mention that is that Karkati gave birth to another son of Kumbhakarna named Bhimasura, who defeated Vishnu in battle, but was later killed by Mahadev himself. While they could show that as an episodic event, it would be nicer if they connected it.