On customer 1.7.0.258 again tryed today out the problem with the imported PS brushes with a Wacom Intuos pen tablet.
First they loading very slow before you can use it, but the size need to set lower then 1000px. This is for bigger images not useble. Yes I can use the normal mouse with 2500px but this can freeze up the whole system. This is also at version 1.6.5
My system: Win 10 64b
i5-4800mhz
16 GB ddr3
Nvidia Geforce 1050ti 8gb