Now I do enjoy a 2hp module, they are literally what started me down my Modular journey.
https://modulargrid.net/e/2hp-blur-silver-panel
Other than buying 2 of these and putting 2hp blanks around them, I really wish this was 6hp stereo with bigger knobs, the 2hp concept is a great one though the logistics of fat fingers and tight rack space means its probably not going to happen.
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.