Update - Visited Lathangi Ford last weekend just for a second opinion. I know, they have pretty worst reviews, but just for another opinion. Moreover, the other two dealerships are Cauvery Ford, which out of reachable limits and Elite Ford, which is worser than any - based on my personal experience.
A friend mine, another Figoian took me there as he gets it serviced from there. The SA drove my car and acknowledged the issue. He too said, it could be clutch and will know the issue exactly once it's opened. Clutch Assembly is about 11K + 2-3K Labour! If Flywheel to be replaced too, then another 3-4K.
I asked him to hook it up to IDS to check on something. He said, sure sir, but it's lunch time, come back after 2 PM. No wonder why they are abused! He didn't even bother to turnout a visitor to customer.
Yesterday, I visited Bosch in Kasturi Nagar and explained them the issue. Two engineers drove it back to back and came up with the same response. One of them showed me the shuddering in the 1st gear with slight release of clutch (which I always experience). One of them said, the flywheel could have unevenly worn and that creates a friction when it's in contact with the clutch. But when I told him that, I have this issue since ever the car was new and every time I reported this issue, FASS did nothing than bleeding the clutch. He said, it could be a faulty part then! Wasn't this am I screaming from the beginning?!
Both of them agreed that the clutch isn't worn at all and good to run, on the cost of this jerky drive. He said, it's a funny issue that you may have to replace something that's not worn. But if not, people sitting in the car may think you don't know how to drive! Well, he just read my mind!!!
He also said, the Acceleration / Deceleration jerks can be due to clogged Fuel Filter, but can't surely say now as the clutch is having the other issue.
BTW, the issue that FASS took nearly 3 yrs to acknowledge, Bosch did it in just 5 mins. The way they test drove in different patterns itself clearly shows their knowledge and eagerness to diagnose the issue.
Here is my plan - Carryout 60K service next month as it would replace both Air Filter and Fuel Filter. If Acceleration / Deceleration jerks disappears with that, then postpone the Clutch Replacement for some more time.
In addition, I have to replace Brake Pads, FL Suspension, Ball Joint & Link Rods. So too much for now.