actually i think it is a splendid idea. A serial does not need just one story line..
1. Current track is to overcome the obstacles in Radhika & Dev's life with regard to their marriage...that cannot be dragged forever ..it has to end somewhere.
2. Intertwining the marriage track can be Rohan's evil revenges ... this could actually go on for life...for instance he will pretend to be good, perhaps marry Bharka but all the while waiting to put a spanner in the wheel so to speak. Similarly Maheswari and Virat they can also perhaps work separately - to make it more interesting for Radhika and Dev - more challenging so to speak having to fend off their revenges
3. Then after Radhika and Dev gets married, they will have to run the Purohit household ... with different tracks of solving social dilemmas, religious rites and rituals and their relevance to modern society (am i being too "cheem" as they say in singapore ... like trying to be too high-brow), all the time defending themselves from Rohan, Maheswari and Virat. We shall assume that DDJ is now on good terms Radhika and Dev (he has to be otherwise they can't reveal the truth of their marriage to society).
With different story episodes... the serial can be dragged... similar to the american serials you have on tv ..
Wow... that would be so cool...