The grayscale theme is a horrible. Whoever made that decision has no clue.
Suggestion: 1) Don’t push update without speaking to your customers. 2) Don’t push updates until the update is complete i.e. “we did this for dark mode”.. great, dark mode isn’t complete so why did you push the update
Easy fix: Allow the user to choose their theme and colors that suit them best.
This isn’t one of those “this is better idea but takes getting used to”.. this is just a bad update. Roll it back or fix it fast.