The house needs to be Cube Root Rule and then needs independent redistricting or some form of PR.
There is no mention of campaign finance here and that is probably among the biggest problems we have.
I prefer "Cube Root Rule minus Senate" for size of House, since Cube Root Rule is supposed to be the ideal size of a legislature, not of a lower house. Assuming DC + PR statehood and keeping 2 Sens per State, so 104 Sens:
692 is cube root. 104 Senators, 588 House members.
No 23rd Amendment since DC Statehood, so 692 EVs, as well, if we're keeping Electoral College.
I like this way better than 692 + 104 = 796 EVs. 588 House Members is also much more manageable for actual House purposes: it's basically a 1/3rd increase in current size.
I disagree with that application for a couple of reasons.
1. The smaller the district population wise, the less value that donors will have relative to voters.
2. It is harder to gerrymander with smaller district than larger ones.
3. It gets NY back over 40 and PA in the mid 20s in terms of districts, which just looks right for my 1940s map fetish.
"Ideal size of the legislature" might sound good in the abstract but counting the Senate towards that number reduces the two biggest benefits for house (1 and 2 above) unnecessarily.
As for spacing and size, put them in a shed or a storage room. Or better yet seize Trump's hotel and put them there.
Also I would caveat that Cube Root Rule.
Nearest whole odd number ending in five, so 695. Last decade would have been 675 IIRC.