If I set the PSI or System load meters' style to "bar", they show the 3 values stacked together, which is ridiculous.
Also, all 3 PSI stats are labelled "Som" or "Ful".
My recommendations:
For Load average, show a green bar from 0 to 1, a yellow bar over it from 1 to physical CPU count, and finally a red bar over it when the load is between 1x to 2x of physical CPU count.
Mockup:

For PSI labelling:
S-C (Some CPU), S-M (Some Memory), S-I (Some I/O), F-M (Full Memory) and F-I (Full I/O).
If I set the PSI or System load meters' style to "bar", they show the 3 values stacked together, which is ridiculous.
Also, all 3 PSI stats are labelled "Som" or "Ful".
My recommendations:
For Load average, show a green bar from 0 to 1, a yellow bar over it from 1 to physical CPU count, and finally a red bar over it when the load is between 1x to 2x of physical CPU count.

Mockup:
For PSI labelling:
S-C (Some CPU), S-M (Some Memory), S-I (Some I/O), F-M (Full Memory) and F-I (Full I/O).