for the gear change problem.. I had similar problem but after gear oil change everything going smooth again...as for handling and f.c problem... I already install minor aftermarket product so cannot comment on F.c but I get 6.4L/100km.. and for handling, last time the car I used, is without power steering so with current steering, I feel much lighter so dunno how to comment on it..but other people said after send it to alignment, the steering feel much lighter..
Is the running period use so much of petrol? Now I getting 9.6L/100km. I feel very high. My is auto want about yours. For the gear change it always occur during morning time or stop the car for some time. I did change the AT oil still the same. BTW want product did you use for reduce the fuel usage. Can recommend me. And power loss or not.
Thanks