#1 #3 You can get Monero KYC free easily. If you need huge amounts, buy Bitcoin KYC free -> swap to Monero. Tada!

#2 Doesn't make sense. It's either private for everyone or no one. You can't have it both traceable for criminals and private for honest users.

#4 Weak point too. You are worried about hypothetical future "privacy leaks" while your blockchain is completely public. Concern trolling. If you would read that article you would see it was only an increase in probability of choosing sender, wasn't deterministic. And even if they guessed correctly they would STILL NOT KNOW amount sent OR who the reciever was.

You cant do necessary upgrades in the privacy arms race without hardforks. The code is FOSS that is all that matters. If slim chance that all devs and maintainers nefariously collaborate we will just fork the project like we did from Bitmonero.