I put my observations on Vrinda in another thread
Why is Vrinda such a BS machine?, so I'll comment on the other things here.
The war scene - is this a war, or a theater? How come Jalandhar, Shukracharya, Brihaspati, Indra, Agni and others are just watching while rank & file deva soldiers are battle fodder for Vritra? Normally, in such battles, you'd have something like Indra battling Vritra (or Jalandhar), the devas battling the asuras and so on. It would hardly be just Vritra doing all the fighting, and the others just looking. I would have loved to see an Indra vs Vritra battle, w/ Indra getting trounced. Brihaspati & Shukracharya would be nowhere near the battlefield, much less Vrinda.
Like Minakshi pointed out, it's stupid of Indra to discover in the battlefield that he left his weapons in Dadhichi's stomach. But the deal about Vritra being immune to several things - I didn't get how the Vajra is an exception. 'Asthiya' means what - remains, or ashes or bones? The vajra was made out of Dadhichi's bones, but in that version of the story, Vritra didn't have any special immunity. If one goes by the story where Vritra wouldn't be killed by any weapon, he wasn't killed by the Vajra either. Also, if Dadhichi's wife is gonna give up her life, would her bones too be used to make the vajra?
Anyway, let's see what Monday brings up. This weekend would have been good for an ME, but I guess w/ the IPL, the ratings would be low anyway.