I dont think you can use many PL lenses, this is somewhat unclear, I would be interested in a 10-xx S16 lens on that camera
Nikon and canon glass is pretty scarce in the 8-10mm range (that is what is required on this sensor to give a FF28 look or thereabouts)
Its also slow, you cant get any 1.8 canikon lenses in sub 20mm, due to the small sensor f2 will give a nice look similar I geuess to 5.6 on a FF35
Basically there is one plastic canon crappo zoom 10-XX
There is also the Tonka 11-16 which has quite a good rep, also slow at 2.8
Cmount wont go on.
As for lens res, it is important to consider projected area, - a canon lens might resolve 6000 lines across its image circle which is (I guess) 2000 lines on the black magic sensor, being just the middle - that should be enough
I guess lenses designed for small sensors have higher res per unit area of image circle..
Altogether a bad design driven by (as you suggest) a few canon fan boys and no optical engineers apparently
The very opposite of beautiful design