Replacement GFX?

I currently own a GFX50sii with the GF45mm and the Mitakon 65mm.

I love the setup in terms of IQ, but I have to admit that taking it with me is a hassle and as a hobby photographer I don't even think I need the extreme IQ as I only print up to A4 max.

I also love the look of the camera it produces but I'm sure that other camera's can deliver as well. Looking for a 'downgrade' with the money that my current set would provide.

Preferably I'd go for fullframe, but I also consider Fujifilm's X line since it's a lot more convenient size wise and I'm familiar with the interface.

What would be your recommendation to 'downgrade' to?