No, I'm with you too!!
Even I feel the essence of the beautiful story that it was is diluted with the introduction of these 2 new characters..
There's enough to show with various tracks already -
1. Sona's possessiveness for Soha - this can be used to help Sona understand Ishwari and maybe help herself and Ish
2. GOlu and Soha seeking Dev's attention - like Ish and Sona - and show how Dev can handle this differently
I admit though, jealousy track will be fun to watch, esp on Sona's part - since it was always shown that Dev is possessive about Sona. Maybe we will get to see Sona's deewangi this time :)