I'm probably going to lean more on real amp distortion, rather than fuzz. I'm really interested in controlling two amps and all my effects with one device. I'm more curious about the FX8 for stereo delays and utility. Can it be used as an AB-Y?
As far as delays go, in both quality AND versatiliy, in my opinion there is nothing you can buy that exists today that even comes close to the delays you'll find in Fractal's stuff. Almost every single delay and/or reverb pedal I know about can be completely duplicated in the Axe-Fx. Digital, analog, bucket brigade, tape, ducking, reverse-ducking, any configuration of mono or stereo configs of any of those, custom panning, pin-pong, or multi-tap, and built-in full parametric EQ control of the repeats if you want. And each Fractal unit features mutliple delay blocks so you can stack multiple types of delays if you want. The Axe-Fx III lets you put up to 4 independent delay blocks in any given patch. Or if you want to get wild, you could route the delay into a separate signal from the main signal chain, set mix to 100% and the level where you want it, then run the delay through additional separate effects blocks and back into the main signal. Basically, if you can dream it up, you can build it in the Axe-Fx.
As far as utility, again, there's really nothing that touches the Axe-Fx. Any given scene can control enabling and disabling any output, or pan each output for a Left/Right style A/B solution. Internally, there are plenty of ways to route multiple signals going to a single source and a adding switching block to choose which of those signals gets passed through.
What specifically are you planning on switching? If you let me know, I'll see what I can come up with for a switching solution.