I have and use PD, now 15.
I am looking for a player, that anyone could use, not just those that understand a video editor.
I'm not a programmer so maybe I don't understand what the difference is frame by frame with different FPS. To me a frame is a frame. Currently, PowerDVD lets me go frame by frame forward even with UHD at 60 fps. What it doesn't let me do is go frame by frame in reverse and no slow motion forward and backward. This might have some design/programming difficulties but I can't believe it's impossible.
These are the controls needed, that work with any video:
fast reverse, norm reverse, slow reverse, play, slow forward, norm forward, fast forward
Pretty simple concept, maybe not a simple execution? Possible execution but maybe not a CyberLink choice?