So I have an ergodox and a Logitech k800. I use the ergo mainly for work due to its programmable nature; and sometimes the k800 for word processing. Every time I come back to the K800, somehow I enjoy typing on it more; I think it's the low profile and actuation feel of the switches. To describe the actuation, it's smooth, direct, responsive and very low travel; laptop style. What I would like to see is a wider or even a separate layout for each hands, and have the layout similar to a kinesis, matrix or ergodox.
I don't know if there are different Logitech K800 out there, but the ones I have heard about have "PerfectStroke"(tm) scissor switches like the ones on the Logitech DiNovo Edge. Those have the best low profile keys I've ever tried. They are smooth, tactile and stable but the key travel is actually quite high for a scissor switch: 3.2 mm.
Compare that to Alps which has 3.5 mm and Cherry (and most other full-travel keys) which have 4.0 mm.
I think that the closest other switch in feel to the PerfectStroke is Topre.
The only ergonomic keyboard I have heard of with Topre switches is the
µTRON. The key travel is 4 mm and the weight is less than PerfectStroke's. You might be able to install O-rings in the switches to reduce the travel.
I am sure that Dox was inspired mainly by the µTRON keyboard to put an inner column on each half of the ErgoDox. The µTron also has thumb keys where some key surfaces slant diagonally instead of the keys being rotated diagonally.
However ... The keys are smaller than normal (being made for Japan...
) and the price is very high. (niche market, made in Japan).
Or... You could mod the switches on the ErgoDox to feel more like a scissor switches.
Open the switches, change the stem and spring to that from a "Cherry MX Clear", lube the stems, install "switch stickers" between the top and bottom half of the switch housing and put O-rings around the stems underneath the key caps.
The "Clear" switch stem has a larger bump which would improve tactility, the lube would improve smoothness, the stickers would make the keys less wobbly and the O-rings would reduce key travel.