A doubt?!

In the beginning, they showed Krish was a yuvraj and he was taking part in some garud dev puja where devrakshika was suppose to dance and so on. He seem to belong to the local raj parivar

I dont think he was Yuvraj Krish even before. He was from a rich family yes but not a Yuvraj. His guards even called him Sir, if he was a prince i guess they would hav called him Yuvraj or Rajkumar or something. That first scene was definitely confusing. Probably, what i assume is - he goes to the lake/river of crocs is just showing his religiousness. N him going to Devsena might just b bcoz it was festival time and he's the richest guy around. Basically it was just to show connections btwn Krish n Radhika, and the whole show is a goof.

Krish was clearly mentioned as the yuvraj of the local family. There was conversation around if the bhavisyavani that devrakshi will dance again at this big puja that was going to be performed by the yuvraj.

Yes it was mentioned that DS will dance when Yuvraj does Puja but the Puja wasn't shown. I guess if Krish did the pooja they would have definitely shown the scene. Krish just came in with some guards and then told the guards to get out of the temple. N probably Devsena danced bcoz she predicted and was happy that an adhuri kahani was about to get completed.
About the CVs I agree. They have the power to make stories BT idk what enemity they have with this show. All supernatural elements what they dint show in their past shows have been put into this. They shud have stuck to making it a normal love story instead of all naags n naagins.