There's still value in knowing the scores though. When it works, it encourages better conversation, and this effect might be weakened if you couldn't see your comments' scores.

Slashdot's approach is to have different kinds of upvote (Insightful, Funny, etc) and different kinds of downvote (Off-topic, Flamebait, etc), and scores are clamped, iirc the lowest value is -1 and the highest is +5.

https://slashdot.org/faq/mod-metamod.shtml