Let's talk about those switches and the allegations of a lack of innovation, shall we?
There are two issues - function and aesthetics.
From a functional standpoint, given three pickups what is an alternative way to select which ones you want? Your basic toggle switch works well for two pickups, but what if you want a control that allows for all possible combinations? I'm sure something could be cobbled together but how do you explain that you have to push this or pull that or engage the mini-toggle for any combination involving the middle pickup? Conceptually three on/off switches is brilliant in its simplicity. Just turn on the pickups you want and turn off the others.
Aesthetically you have to give them credit for using 0,1 rocker. The convention for 0 off, 1 on is commonly understood almost universally. It is easier to look at a glance and see which PUs are on. You can do that with slide switches but you still have to remember that when the switch is closest to the strings it is on (Or is it off?). Trivial for an instrument you play daily, but how often have you rediscovered an old friend and had to spend a few minutes relearning what the controls did?
if you accept the innovative, non-traditional pickup selectors (and yes there is some tongue-in-cheek here since on/off switches have been used as controls many time before, just not recently) as the way to allow for all combinations then the only real issue is where to put them. They pretty much have to be on the top face since there is a greater risk of the rockers being moved going into or out of a gig-bag or case if they are on the back or sides of the body. They also need to be accessible for those players who want rapid changes in selection. Somewhere on the pickguard makes manufacturing easier and where they are makes more sense to me than "below" the strings.
While traditionalists may have legitimate concerns about the controls, in general, I wonder if the switches and the single volume and tone controls will give rise to a generation of players who don't obsess over which PU is in use in the middle of a performance and choose, instead, to focus on the tone control or their pedal boards to get just what they want when there has to be a contrast between a solo line and rhythm chords in the same song.
I think there are a lot of things Guild got right although my opinion is certainly skewed towards a market full of beginners or intermediate players getting their first or second instrument and not towards a market full of experienced players with strong opinions and preferences.
If they introduced a similar bass for $350 I'd be really tempted just to satisfy my curiosity. I can't quite grasp the idea of three pickups being useful but two J style, possibly wired out of phase, and a Bisonic might be fun.