I find as soon as I integrate any module within 3-4 rows of other modules then almost no module has any ergonomics.
Maybe if all you had was one long row of Mutable Instruments gear ;-)
If all manufacturers did the following and users planned their modular this way:
Users only ever to have VCO's at Top, Filter / VCA below / mixing & effects below.
...then...
Manufacturers have VCO output at the bottom of the modules, filter and VCA inputs at top with outputs at bottom, then effects and mixing all having inputs and outputs at top.
Any module less than 3hp would be Banned and only Blank Gap-fillers allowed.
Enjoy your spare HP, don't rush to fill every last space, this is not like filling sticker books. Resist the urge to 'complete' your rack, its never complete so just relax.