Just got back from a ride here in Ft. Lauderdale, in the rain, and had a chance to test it some more. Tested mode 2 High (OO) setting while trying to lock up the brakes and could feel no difference from mode 1 Low OO setting. Brakes feel better than original.
I presume this is with the "Low" OO setting. If so, can you test it with the "High" (OO) setting?
I'm going to speculate that when the brakes are set to the "High" setting, they will still be linked.
I hadn't thought of testing the link mode yet, but would assume it will have no effect on how much it changes it since the line(right front caliper line) that does the rear to front link is blocked. When applying the rear it goes through the ABS block then to the right front, which is now blocked so nothing goes from rear to front. When applying front the pressure goes from front master to ABS block then to rear and both front calipers. So, if you think about the routing of this the mode won't have any effect. Mode 2 is applying more pressure to right front.
As for bleeding it I just bled like I would normally. How I do it is to have a clear hose attached to a sealed plastic container with a line out on it for vacuum. I'll suck out all the fluid in the reservoir, refill it then attach the hose at each bleeder point and pump the lever a few times, hold it and release the pressure from the bleeder. I don't see the need for any speed bleeders at all. I can bleed the whole brake system in 15-20 minutes.