For those who have to leave a map to avoid a hacker or they can't reach their goal because the map closes, I think people who don't die should keep their killstreak between maps.
Visit my thread about the "auto-ban". https://www.cubecraft.net/threads/how-can-cubecraft-up-their-anti-cheat-systems.343350/Honestly, its a good idea, but instead of this we should be able to "auto-ban" players. This is mostly about the hackers and not the killstreak.