This is definitely a fair point with home row mods, which I left out on the blog. ZMK has has had the best configs to manage the timings for me. It requires some tweaking based your typing speed.
I just got a toucan. The touch disc on it is great. Having a pointing device in fingers reach makes it appealing enough for me to consider upgrading from a corne.
I havn't tried it but its way up on my list to try. Another one thats really out there is the svalboard. I really dig that the trackball is just under your hand.
Miryoku is a solid layout. Designing your own layout is definitely time consuming, and not something most should try diving into if they are new to small form factor keyboards.