Ever since Mattias spanked my furry arse above (thank goodness for all the downy cushioning
), I've used his browse instruments trick a lot for importing MIDI. It is a substantial timesaver once you're aware of it.
However, I still miss the old (Reason 3-5) method of MIDI import creating an empty Combinator for each seperate track in the MIDI file. I can't see why that can't be provided again as a Prefs option, as loading MIDI files can be painfully slow at times with the ID8 approach - it is a sample-based device, after all.