I personally would have loved it if Dev gave Rads a tongue lashing for even walking him up to Vish ... but i think they do this for their TRPs (dont know if it works though). There could have been a more creative way to make Rads believe that Dev had gone up to be with Vish (when he actually had not) which forces her to question herself and run to get him
However,they may want to show Vish that even if Rads is okay with it, Dev is not and that can only happen if Rads leaves Dev at the door
At least by making both of them decide at the right time, (almost simultaneously) ... they redeemed the situation somewhat
So while this show will keep hinting that something or someone may come between them all the time ... to keep audience BP high ... they will always maintain the integrity of the raDev relationship. They are different in that respect