Are you sure, the stutter is gone? If I add 1920x1080@25Hz to the whitelist, 25fps videos do not stutter all the time anymore, but still stutter from time to time (like 50fps videos with 1920x1080@50Hz).
So, this does not solve the problem for me. There is something wrong since LE 9/Kodi 18 that needs to be fixed. But it looks as if nobody is able to fix this, so I will go back to LE 8 soon