I've come back to looking at this unit again because it serves so many functions.
I've realized how much hum is being added by all my true bypass effects pedals, tuner, and compressor. If I understand this correctly, the buffer in the unit will reduce my impedance to create less noise in all the pedals. Plus I can run them in the mix effects loop and keep them out of the signal chain, which is good since most of my true effects (distortion, chorus, envelope, synth, phaser) are only used on a small percentage of my tunes with my main act, and not at all with many other gigs. This saves me from having to move pedals to another board for gig where I don't need everything on. And I can run the compressor through the serial loop and get the tune out of my signal chain together. AND i can turn some of those effects on simultaneously with the mix switch for times when i need a combo mid tune.
All good, except that the our input buffers will not improve the sound of your pedals but will almost certainly have a positive effect on your sound. You missed one other goodie: the mix channel will also allow you to mix some of your original signal to your effects signal to keep the "bottom" of your sound. This feature is very useful when you use distortion pedals for example.
I also can replace my aguilar tone hammer that I use as preamp/DI and probably improve on the tone of the DI and preamp controls. I also have a radial bassbone I can sell for the times when I need to use URB or a second electric. The input impedance switch also reduces my need for an URB pre amp on gigs where I'm doubling.
I'm thinking when I factor in what it would cost to get a looper and after I sell my Aguilar and bassbone I'm not going to be spending too much money.
If you add the cost of all the tools you need to buy to be able to do what the basswitch does you will end up with a cost higher than the cost of the basswitch and your are not sure to get the same sonic quality.
I do have one question about using the serial vs mix loop for Jacque: I use my buffered Tech 21 VT bass for some overdrive about 25% of the time on my main gig. Can I leave that in my serial loop so I don't have to also switch on my mix loop with all the other effects every time I want to use it? I'm not sure if the constant degradation of the signal is something to worry about, but we do not pause long between tunes so having to hit one vs two switches is something to think about. Plus that means all the other effects that are less used will be getting passed through more of the time; maybe 25% of the time instead of 10%.