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I have no idea if NTFS support would be added, but the recently released library is not for use in MFW. It allows homebrew devs to add NTFS support to their apps. This does not translate into NTFS support in GameOS. For example, it can be used to allow an AVCHD or other type of media player (think XBMC) to playback files from an NTFS volume. It does NOT allow a backup manger like MultiMan to mount games from an NTFS volume since GameOS is required to play the games once MultiMan exits.
Update: kakaroto and the other devs behind this are aware of the bug that causes this MFW not to be able to copy saved games to/from a usb source. They state that it will be corrected in the next release.