AGS/AMT is not a jugaar system invented by Suzuki Pakistan, it’s been around since 1930 and well tested.
Like any technology it has pros and cons, it’s just a matter of understanding how to get most out of it and what are the limitations.
Apart from good mileage, you also get very high performance/pick as you have somehow control over gear selection(again with matter of understanding and experience). For more control on gear selection you can use manual mode with simple stick up/down gear shifter.
But it also have a fraction second lag that can be reduced to nothing with better understanding/experience.