1. No. He died to show us Luffy without plot armor.
2. Yes. But his crew died so he became depressed like Moriah, Crocodile, Bellamy and Squardo. He will become a bitter silver medalist, stagnating and reversing. Perfect shichibukai but unfortunately that doesn't exist anymore.
3. Yes. But his crew died so he joined Blackbeard out of anger. He will be key somehow in Blackbeard killing Shanks.
4. Yes. But his crew died so he joined Blackbeard out of anger. He will fight Law that has joined Luffy in the New God Valley war. 3B vs 3B, both took out Big Mom, both lost to one yonko each.
5. Yes. Kidd pirates will learn like Strawhat Pirates did after Shabaody. They will get a mentor and come back stronger.