I hate pervert characters with a passion. Only exception is Sanji somehow but I also hate pervert gags. And no, any other character prototype is fine for me getting CoC except for crybabies. I hate crybabies if you didn't know.
Has Koby even actually cried Post-TS aside from the tears of happiness he had, because Luffy was achieving his dreams? I might have said it before, but he's surrounded by Blackbeard and his Commanders, beaten, hand cuffed and deep in enemy territory telling Teach off in the flashback from Chapter 1080. There are no tears there. He doesn't look afraid. Contrast that to Pre-TS when he spoke out against Alvida and later Akainu.
He's obviously had a lot of growth and as things move forward, it's probably going to happen less and less if at all. I do understand why people would be annoyed by characters that cry a lot in Shonen. Characters like Deku, Koby or even Usopp crying isn't my favorite thing in the world, but there's a lot going on with these characters. They're well written (at least Deku was... I'm not caught up on MHA). But everyone has their own preferences and that's 100% fine.