Brother, thanks for spending your time in writing such a nice and detailed info
Lets come to the issue. I have to clarify some points.
I will change my CVT Oil for sure. Because I need to examine the behaviour after changing the oil.
I dont feel any problem when I start car in the morning. Everything is okeh, whether P, N, or D. I feel problem when I have driven car for almost 3km or 4km with A/C. Every time I stop the car with A/C. the RPM drops and then gets normal. During drop I feel vibration. The condition gets worst with more running. Therefore, I switch OFF A/C before stopping. This way I travel longer. But if the car has been run for more than half an hour, then its almost difficult to switch ON A/C when car in at some signal stop. It shall put load on engine, and RPM drops. Therefore, I switch ON A/C when car starts moving because RPM are higher than 1000 so it is then okeh.
However, this START CLUTCH RECALIBRATION, I shall surely do, its interesting and good thing to learn. :)