Hi Markus, I understand what you mean. I live in Central Europe, and in the autumn and winter months we don't have much light.
I actually come from Spain, which is just opposite of Australia, and in Spain the light level is very similar to that of Australia, so I would see the EVF as more necessary if I lived in Spain (or Australia).
But of the 3 options, I already have a camera without IBIS and without PDAF, the Nikon Df, and I think it is sufficient in terms of its limitations. Today I think that in the mirrorless world IBIS, PDAF and weather sealing should be essential.
I shoot quite a bit with ultrawide, and there's definitely some sort of weird interaction between IBIS and ultrawide lenses, at very slow shutter speeds. So I bought myself a G100 to use with my Laowa 10mm, or PL 9mm, as a dedicated ultrawide point and shoot. The corners of the shots taken with the G100 are consistently better/sharper than with IBIS equipped bodies.
I've found the same quirk with my S5. Possibly even a bit worse, but I'm wondering if that's something to do with the combo of flash and slow shutter, where it became quite apparent. So I'm comfortable to leave the stabilisation to the lens, when it's really needed. Just as Panasonic used to do, before public pressure kind of forced them into including it. As for OIS and size penalties, the already mentioned Lumix 12-33mm puts that to bed.
Oh, and I liked the little G that much, I bought another one. No IBIS, no PDAF.
I'm actually really really disappointed that Panasonic bowed to public pressure again, and gave up on DFD. I actually deliberately bought the S5 over the MkII, as I think it works brilliantly. As one reviewer said, it's the best focusing DFD camera yet. And comparing it with my G9, I have to agree. They got so close with it, but didn't quite get there.
For stills, I think it's more than adequate, but as Panasonic have said, they're going for the hybrid market, where PDAF is already there, so I can understand why. But in saying that, I don't think a small travel oriented camera is where you're going to want killer, bleeding edge video tech. As I see it anyway.