UC & lc wide - wght: 900 | wdth: 151 | slnt: 0 | GRAD: 0 | opsz: 14

lc

* a - bottom left too dark, spacing is little too loose.
* a - the opening in between the bowl and top seems to have gotten a little too small for a 14pt opsz. I think making the bowl slightly smaller would fix this and will be better than raising the terminal.
* i - raise the dot on i slightly and make it slightly bigger
* g - compensate joins a little more for g than b d p q because the letter is denser and needs more aggressive treatment.
* t - the top is getting a bit muted. I suggest you raise it slightly. The terminal at the base is too.
* f+i clash. Please make the f less wide on top.
* k - this needs compensation at the joins and to generally be a similar weight.
* f, j - more sidebearing on both sides
* r - stronger compensation at the join like n.
* z - maybe a narrower diagonal or horizontal strokes. Either way.
* y - contrast between strokes seems a bit too exaggerated

UC
* S - Middle too heavy
* M, N - joins need compensation
* C - terminals need slightly more weight
* I - slightly heavier
* F, L horizontals slightly heavier
* K compensation @ joins - diagonals with less contrast in weight
* O slightly heavier probably in the verticals maybe by making the counter less square in which case adjust C G & Q
* N & M contrast between strokes seems a bit too exaggerated.

Start with the UC and lc glyph adjustments listed for wght 900, wdth 151, slnt 0, GRAD 0, and opsz 14. Review each named letter against the requested weight, spacing, joins, terminals, counters, and stroke contrast; done means the listed issues are resolved at those settings.

Written by the indexing model from the issue text.