Thanks for this. It's important to know the witnesses who speak up. If they don't have a statement or didn't fill out @cervantes survey, I ain't voting for them (I'll make an exception for people against because they said something.

I looked into @clayop's HF21 post, it's here: https://steemit.com/kr/@clayop/hf21

He mentioned that SPS only takes from posts and not other areas, also it's a little much in general.

He says he was 1 of 4 witnesses against SPS .
(저는 포함한 4명은 컨텐츠 보상 감소를 최소화하고 SPS 비율을 적게 가져가자는 쪽이었습니다.)

He explained a little about 2e12 curve, saying it's unfair for small posts and quite good for large posts. He added a little math, but that's covered in English posts on the subject.

If the math is accurate curve is a little too wide [unfair].
(만약 이러한 계산이 맞다면 저는 패널티를 주는 구간이 너무 넓다고 봅니다.)

He doesn't really get into other parts of EIP in that post.

He has written about EIP before, but, I'm too lazy to go over them in detail(my Korean is only alright), but he isn't too concerned one way or the other, he is more interested in dealing with the changes for curation and avoiding flag wars in his community.

He ends by saying he will relay the information other witnesses give to the Korean community and vice versa.

My opinion:
Korean's aren't too worried about being downvoted by non-Korean readers, if you downvote someone because they are using a language you don't understand you are probably deserving of what is coming.
Maybe they will start attacking abuse of the -kr tag by people who can't use Korean?