Great.
unfortunately nothing you can really do. It’s in the design of the turbine, the better manufacturers spend hours and hours getting a low idle thrust and good acceleration. Some turbines are double and even triple the best brands.
I find customers only look at the stated power. I look at the power, where the power is developed in the rpm range and idle thrust.
All you can do is add drag with more flap. 85 degrees is possible
Dave