Dirk, your comments here echo much of what I have written in other threads.
The lack of a non-niche 28mm lens is perplexing. To forestall the inevitable response, 24mm is not a replacement. I have long found that 28mm is the widest I want to go without dealing with perspective distortion. Those "trick wide shot" photos are fine... but 24mm is neither one sheep nor the other, not wide enough for architectural interiors for example. It completely eludes me why they have become popular. (With my kit I bought the Lumix 35mm, because I'd rather that than going wider than 28mm on a prime.)
The need for a small body is also apparent, if only to compete with other brands. My priority is to have a smaller, lighter unit to carry around all day. That's why I stuck with MFT for many years. Olympus E-P5 + VF-4 + 14mm + 45mm = 590g and fits in any bag. Lumix S5 + 35mm + 85mm = 1365g but much bulkier, requiring a dedicated camera bag. The lenses are actually the lightest in their class but are bulky. The camera is distinctly bigger than others from Sony and Sigma.
For me a rangefinder shape is not necessary. If Panasonic want to release the Lumix S7 as a smaller SLR body, I'd be fine with that.
Above there's a picture of a woman looking down into TLR glass. That's my favourite way of using a camera, and why I remained with the older model PEN E-P5 with the 90 degree viewfinder. If you want inconspicuous, that is the ultimate. With the camera held close to your chest, no-one even knows you are taking a photo. This has also worked well for me when sitting in an audience.
So, yes, I want to retain the stills and video facilities of the Lumix S5, improve the viewfinder to match the other models, improve/streamline the interface and menu system, and reduce the size and weight by about 200g. This might look to some like asking for the moon, but other brands show it can be done. (Sigma fp L + EVF-11 = 530g.)