A new file browser system on OS-independend GUI-level would be very useful to load files of any type (samples, patches, mid-files, configurations ect.). The file system can look like the existing DH_filebrowser but without the 1000 character limit.
I think of something known from Kontakt sampler.
A realtime string-search-field would also be cool.
Sizes should be customizeable also colours and transparency is useful.
Customizable scroll bars should be implemented.