As far as Kripa's gallant act of putting Prithvi's ring back on the WRONG finger is concerned ( it was her right hand) ... hmmmm.... honestly, I expected her to do just that .... otherwise .... she would just NOT be Kripa (as we have come to know her).... I think the real challenge for her will come when she realises that "Moving on & away from Angad: is easier said than done"... she will have to fight her inner demons & longings(the itch to go back to him as it were)... and like u put (very beautifully ) A & K are still very much vulnerable to each other.... so its going to be an uphill task for her.
( lets see you deal with this St Prithvi: Angad ingratiating himself on every waking thought of every day of Kripa's life!)
Plus, I have this sneaky feeling that Angad might pull a volteface , once he finds out that Kripa knows about his atonement ...& thinking that she didnt feel his sacrifices were "good enough" to forgive him & his past sins .... he might turn nasty (in other words ... we might see him back in his old 'steam-roller' skin... (I am taking what I want)... I think..... So he mite concentrate on getting his star status and his girl back.
And another thing ... prithvi might have scoffed at joining hands with Karthik now, But if angad is back to his former self, I am sure that Saint Prithvi will (promptly)lose his piousness & celestial glow & his (irritating)halo will be replaced with 2 horns and a forked tail & karthink will be his Best Bud .... seeing as how all's fair in luv n all that.... what say?