The short fall of the Bessa cameras in my eyes is all around that otherwise wonderfully bright RF/VF. The EBL is too short to focus fast lenses in its natural state, the 2 cameras, but by increasing the magnification to 1:1 in the 3 series you loose framelines wider than 40 and for glasses wearers perhaps 50. The cameras are wonderful, the VF superb. I don't like the compromises.
That said, I am pretty confident that I will be putting out for an R4a. I will use 35mm and wider lenses only with it. I am also often tempted by the R2a and R3a, but neither in my eyes is a good solution to use a 35mm and fast 50 kit. That is a tough place to be for a RF camera.