At least you have omitted the midi out thing from your list.headquest wrote: + A superior sampler. So far as I know Kontakt, HaLion and Mach Five haven't been ported to RE yet (will they ever I wonder, given the rumoured poor sales of RE?) so Reason users are left with the 12-year-old NN-XT ... STILL. And no decent orchestral samples, etc. For a lot of musicians that is a deal breaker.
+ Video support is a must for most semi-serious musicians these days, and is regarded as a pretty basic feature that even freebie and inexpensive starter DAW packages usually include (Cakewalk, Reaper, Magix, Mixcraft, etc) although I accept YMMV.
+ Input/output File formats, uploading to the internet/SoundCloud, etc
+ Professional audio editing
+ PDC, Freeze, etc etc.
Nice to hear from you again Headquest and I see you are still working on your Reason trauma. I am glad if my posts can be of any help for you to achieve catharsis in this regard some day.