FT v MFT lenses

Well yes, but the Pentax system was still quite bulky.  The MFT setup is tiny.
Let's come from the other direction - if you made an OM-D with PDAF and a (detachable) honking great grip, for which Sony and hence Oly now have the technology, you have the best of all possible worlds.  Slam on grip and ZD lenses and you have a system that gives away only a bit of IQ and flexibility to FF but is far smaller.  Exactly what FT always promised.  Detach the grip, put your ZDs away and pocket some MFT primes, and you have a truly tiny prime based system.  Everyone wins.
The only gotcha, around here, is, some people have stayed because they just don't like EVFs.  Well, there's clearly personal preference involved, but I shoot in dim light, bright light, action and landscape, and I can find no way in which the OM-D EVF is unsatisfactory and several ways in which it is very clever, so while there may be some whose particular ocular physiognomy it does not suit, most just need to get with the program.

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