Suspension:
Please do not change tyres till you've completed 10,000 kms.
I experienced stiff suspension in the beginning, but now with 9,600+ kms done, there is a significant difference between before and after. I personally find these tyres very appropriate for dry conditions and think that these offer a good balance of grip, comfort and low-noise.
Steering Vibration and Alignment
Take the ride to the dealership and request them to balance the wheels.
I have taken my ride upto 160km (during trip to Kund Malir) and have driven constantly at 130km cruise and haven't felt "any" steering vibration whatsoever. You need to get this checked.
Yes, during off-roading, I do sometimes feel bumps related vibration in the steering, but I'm assuming that's normal.