A7IV? I wish. I have one on order LOL, but I'm in the US and we won't see them for another month. Right now its the a7III/a7sIII combo for me. All of your S5 points are great and honestly features I would like to see on Sony, though I get monitoring and false color with the Ninja which I don't mind rigging.
The latest Sony AF has been a game changer for me, I need glasses for anything within a few feet and its just made me so much faster, I almost never focus manually because I can't see further away with my glasses on. So I'm looking forward to the a7IV to better compliment the a7sIII - Sony's real time tracking never ceases to impress, its really, really good. The other upgrades are welcome too, and I really don't mind the 60p crop, even if I didn't have the a7sIII.
Cheers
Chris