There was a graph in Fuji's presentation (linked all over Fujirumors) that shows this... Actual resolution in the print is affected by the lens, the low-pass filter and the rest of the filter pack over the sensor, as well as by sensor characteristics, mainly noise. Fuji tends to be pretty darned close to optimum on all of the above (no low-pass, X-Trans seems to be pretty kind to resolution, VERY good lenses). Practical, printed results from the 16 MP X-Trans were MUCH better than many other 16 MP sensors (especially older sensors or Micro 4/3, and, by the time of the X-T1, most 16 MP sensors were Micro 4/3), and were not as far off 24 MP APS-C as one would expect - they were in the expected range for about a 20 MP sensor, and could catch a 24 MP sensor under certain conditions (until the FE lenses came along, E-mount APS-C always underperformed due to lenses - even now, you have to use a full-frame lens on the APS-C body, because the APS-C lenses are mostly cheap kit zooms). If you wanted to show 16 MP with higher resolution than 24 MP, the test was easy - XTrans II with a great lens (most of the primes will do, as will the 16-55 f2.8 or the 50-140) against a NEX-7 (the first and noisiest generation of the 24 MP sensor, and has a low-pass filter) with just about anything other than the best of the FE lenses.
To get the 24 MP X-Trans III (which, by all preliminary accounts, is a truly wonderful sensor, coming very close to the theoretical limits of 24 MP with a good lens - and if Fuji has anything going for them, it's good lenses!) to outperform a 36 MP sensor, I can think of two routes. First, I suspect it might well outperform the not yet introduced APS-C 36 MP sensor in a relatively fair test (Fuji clearly spent a lot of time on the sensor, and would have bought the 36 MP if they preferred it). I have no proof, but that may not be a great sensor - Sony would have introduced it by now if they were happy with it, and it would have also been logical for a high resolution, lower speed variant of the Nikon D500. Add in a typical APS-C E-mount lens and you may well have something that underperforms the Fuji.
Even if you look at a FULL-FRAME 36 MP sensor, especially an early model with a low-pass filter, the real resolution is not that much higher than a great 24 MP sensor - the highest numbers for 24 MP sensors are around 3200 lines/picture height, while a D800 is around 3500 (all of these numbers need to be taken with a BIG grain of salt, as two cameras with the SAME SENSOR, both with no AA filter, can come out a few hundred lines apart)! Put Nikon's standard 24-85 FX zoom on the D800, and a 90mm f2 on the Fuji (or the 16-55 f2.8, to go zoom to zoom), and there goes the difference! Yes, the lenses are no fair, but Nikons spend a lot more time with lousy zooms on them than Fujis do, even 36 MP Nikons...
I would be much more disappointed if the lock button in the middle is not used to lock the auto shutter mode anymore - as I am used to from my X-Pro1. It would be the logical consequence if the dial would work as you have suggested. That's not going to happen.
There will be no actual X-Pro 2. Instead the teased rumor is about something that will replace the X-Pro 1 but it will not be called X-Pro, because it is too different technology-wise. The "major breakthrough" that fuji said it wanted to wait for with the X-Pro2 is too major to stay with the X-Pro branding. Hence a new camera section in this forum.
There will be no actual X-Pro 2. Instead the teased rumor is about something that will replace the X-Pro 1 but it will not be called X-Pro, because it is too different technology-wise. The "major breakthrough" that fuji said it wanted to wait for with the X-Pro2 is too major to stay with the X-Pro branding. Hence a new camera section in this forum.