I think the examples mentioned above, it was quite clear one or the other person had serious issues that wouldn't make their jodi very nice...but I also think about HumTum as a nice example. Naina and Sameer probably will not end up together right away, I think there will be some time of separation before the two mature up and become more similar to each other...
Of course, there will lots of dramas, like musunderstanding, separation and all as Shashi herself has said their marriage was not easy, though their friends group had supporred them hard. And that's why we are seeing the friendship bondings, friendship chemistry like this because except from the fun quotient they all will be Samaina's support system.