I’ve optimized Clutch and Blitz Kills a bit:
In the previous version: The system only took into account the last enemy killed. If the last enemy was killed in the first 25% of the path it caused a Blitz Kill. If the last enemy was killed in the final 10% of the path it caused a Clutch Kill.
In the new version: The system takes in account ALL enemies (The Clutch Kill range was also increased slightly). Only if ALL enemies are killed within the first 25% of the path will it cause a Blitz Kill. However if ANY enemies are killed within the final 12% of the path if was cause a Clutch Kill.
TL;DR: Blitz Kills will be slightly harder to earn and Clutch Kills slightly easier.
ALSO: Boss kills no longer award Blitz or Clutch Kills. However, the end of round score screen will now reward you for killing the boss quickly.