Here is what I think.
Four weeks trps are around 1,3-1,1 (not counting last week 1 coz part of that decrease is coz of festivals) and 0,1 people who weren't watching during Navratri come back after.
Ever since time slot change drama is on high level and story is moving fast. Each week could have been at least one track.
Udaan had minimal promotions for these four weeks only 11 sec promos. Means Udaan on this slot on its own can grab 1,1 trp.
There is no need for new track. Makers should only continue with this track little slowly. Reduce drama quotient and bring more balance between emotional scenes and drama.
The rest is on Colors now. I think Udaan established with 1,1 trp now and if Colors wants more (there is no question, they want) they should pay more attention to the show. Normal duration of promos and regular airing will be enough. Some special episodes here and there are not bad idea, but only and only if they are not out of blue and if they don't happen like every week. I think Udaan KC special and Saturdays mahasangam are good idea from Colors side.
I don't know what is reason for high drama by makers at first I thought it was wish to bring some of old Udaan's audience but am not sure now. I just know it has to reduce. We have wonderful leads, and after long time great vilians. Now they should continue the track with some normal speed and Colors need to do their part and I think trps can rise.
For four weeks Udaan is unable to affect rival shows trp. And it's absolutely not coz of content of the show coz viewers are not even giving a chance to see udaan. Here I think it's upto Colors to promote the show regularly and makes people think about switching off from YTG to Udaan.