The ff/fr is a problem with most, if not all, DVD-A (and possibly SACD) players. You may never get the same ff/fr experience with DVD-A / SACD that you get with CD because of the unpacking of data during playback.
It does not simply uncompress the file in memory, and then play, like a PC with a .zip file. It is unpacking as you go. So to unpack for ff/fr, it has to have a buffer and work its butt off.
One of the bottle necks is the data transfer from the loader. There is a little player from China using an MPEG decoder from MediaTek. This MPEG decoder is actually part of the loader. Its navigation is faster than anything I have ever seen. It will go from full FW to full FR smooth as silk. They can do it because they have the MPEG decoder attached to the loader.
Of course the image quality is something else all together.