My idea for making the Kill Team a bit stronger, was increasing their points cap. Even before hitting max of ten models, its all too easy to hit the points cap, especially with more resilient/techy armies like (Chaos) Space Marines. However, keep the 10-man cap.
Of course if this goes through, the Defence team should have an increase as well, but not as much. Maybe 300:200 for Defenders:Kill Team? 300 also brings the Defending side closer to what a Combat patrol would be, and more people would be familiar/comfortable at that level. Increasing the Kill Team allowance to 200pts means they can squeeze in those two extra people, who could tip the balance in their favour, or add that one tactics changing piece of wargear.
Doing this would make the Kill Team player have to decide more strategically with the army list alone, which means more thought out lists, and potentially stronger lists. you've seen with mine that I try to keep to a single squad, mostly because multiple squads gets confusing and complex, but also becuase a single squad is easier to max out with ten models.
What do you think?