Ok one last service I would suggest you to get done that is engine decarbonising from Motor Clean Pakistan. You can find their page and videos on Facebook. The service would cost about 5-6k and they would clear off all your engine carbon deposits through hydrogen feed running in your intake when the car is idling.
I had rust coloured crap come out of the exhaust when I floored it. They took my catalytic out for service and cleaned that too. My low end torque has gone much smoother and car is much more responsive now. I was averaging 13km/l before and it's jumped to 15.5 km/l without eco engaged.
They also have a service of cleaning the catalytic without opening it that costs 3k vs 2k of opening it. So better have it done closed since of my bolts there was rusty and snapped off (had to be welded back on). But yes this will restore your car's health and efficiency a lot.
EDIT: The outlet is opposite Packages mall gate no 2 in the service lane. 0320 4772455 Shahbaz. Give him my reference and my blue n One he will throw in a discount too. They have a promotion going on for PakWheels members well.