Your comparison table isn't correct.
The comparison of "ergonomics" ignores, whether the keyboard is flat, or curved.
The "Kenisis" is "Kinesis Advantage" in actuality. Input Nirvana, Lanx and others have made it fully split, added arcade buttons to it,... there are even a few threads about custom controllers. All Kinesis Advantage keyboards support on-the-fly macros and remapping out of the box, only the cheapest version of Kinesis Contoured (made until ~2002) didn't.
TECK already officially supports remapping using a web UI. You can obviously replace most keycaps and switches (with some soldering).
Finding a tenting solution can be a pain.
Kinesis V3
The ErgoDox is large and heavy, especially if you get the “full hand” size case (which I recommend).
Mine weighs under about 0.6 kg; I wouldn't call that heavy. I've carried it around, more or less as a part of EDC. It isn't full hand, nor do I recommend getting a full hand one, because of portability and preference for "floating" typing technique.
I would also suggest not trying to learn a new keyboard layout when switching to the ErgoDox, you will just make your life harder.
I recommend the exact opposite. Keep your QWERTY skills on the ordinary staggered layout and learn something efficient to be used on an ergonomic keyboard. It's easier to maintain separate muscle memories.
I share your interest in the Axios though.