(not moderation content in the slightest, personal opinion from jjrandorin the regular poster)
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I wouldnt mind another positive reaction, such as something that shows empathy, but wouldnt personally want to see anything that could remotely be construed as another negative reaction.
For example, I wouldnt want a "frown face" or anything like that, as it would likely end up as another "weaponized" reaction, like the "disagree" reaction is used, for example.
I am not sure what is the appropriate reaction / emoji for empathy is, though.