The problem is there's no good ergo layouts with mechanical switches. Something like the MS Ergo 4000 or Sculpt, with Cherry MXes.
Closest I've found is the Matias Ergo Pro[1], but it has several inexplicably bad design decisions. Dedicated Copy paste undo buttons, that just send ctrl-z,x,c,v. Awkward positioning of Ctrl and Escape for no reason. Terrible crappy little arrow keys. Really weird shit like having a USB hub, then putting the port on the inside with no space to plug things in. After using it for a month, I'm still often making mistakes and will probably go back to the MS Sculpt, which at least has scissor switches instead of the terrible domes.
It's like every keyboard designer to do ergo has had a stroke and intentionally messes stuff up. Kinesis is stuck in the 90s with their huge success and terrible look (and again, weird layout). The Keyboardio is probably the least offensive, as long as the modifier key system is smooth. It's stupid that in 2015 we still don't have great keyboards. The stackoverflow guy's CODE keyboard even focused on backlights. Who the hell is spending $100+ on keyboards and can't touch type? Strange market I suppose.
1: http://matias.ca/ergopro/pc/