I greatly appreciate the ToH as a way to compare various potential devices. One of the challenges I face is knowing that there is often a significant performance difference between an ARM-based chip and a MIPS-based one, not to mention within the various "families" of each of those architectures.
While CPU count and clock speed are valuable hints, I don't have a "secret decoder ring" in my head between the manufacturer's chip number or the OpenWRT/LEDE "target" and the underlying chip archetecture.
Providing even high-level information would be helpful for those looking for "a fast, two-core or better, ARM-based" unit.
I'd be happy with a column that derived the underlying architecture from the "target", a fly-over, or a link to a pop-up that described them. While a couple of those listed under https://downloads.openwrt.org/releases/17.01.4/targets/ I can guess at (arm64, x86), a lot of them I have no clue about from the manufacturer's part number alone.
Edit: the "package architecture" column looks like it provides sufficient information. Might want to consider revealing that on "device-selector" pages, perhaps beside the CPU speed and count.