One would think that a software program could be designed to function across the board to do these things smoothly. Heck, if they can send an unmanned probe to Mars and Jupiter..... 
IMO, despite the many problems I've had with Manic Moose in the past (all documented on this forum), I would say things are working really well.
Of course, that's with my curated collection: carefully tagged FLAC files, all containing an album artist, with multi-disc albums separated into separate sub-folders, with carefully sized/embedded art work, all special characters removed from file and folder names, duplicate album names pre-fixed with the artist's name (e.g. Greatest Hits becomes "ZZ Top - Greatest Hits), et al.
I have a dedicated version of my library for use with streamers, curated as described above.
On the other hand, my iTunes library is all AIFF with multi-disc albums collected together, etc., and when I try using that library with MPD I have all sorts of problems (e.g. track ordering issues, many albums will not be parsed, metadata-wise...). I have been tempted to try this again, as new newer MM betas are using an updated version of MPD and it may be that these problems are resolved.
But I am so loving the sound of my FLAC files on my Corsair FLASH drives that I don't want to mess around with any of this any more and am spending my time just listening to music ... imagine that
