Cyrillic wght: 100 / 400 / 1000 | wdth: 100 | slnt: 0 | GRAD: 0 | opsz: 8

wght: 100 | wdth: 100 | slnt: 0 | GRAD: 0 | opsz: 8
Х К seem too wide.

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wght: 400 | wdth: 100 | slnt: 0 | GRAD: 0 | opsz: 8

ж feels slightly dense in text.

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wght: 900 | wdth: 100 | slnt: 0 | GRAD: 0 | opsz: 8

ф х б к seem a little dark in text.
'+' symbol is really dark.

ЛД left diaconal stroke looks a little light. Л feels too wide and has pretty narrow sidebearing on the left.