Netters and Herders are both 45, which lets you bring a lot of extra bodies.
I'm interested to see how different types of list will work - there's a lot of variety, from elite Squid-riders to hordes of cheap goblins. In Kill Team, Tyranids are hard to second-guess when list building, as they have such a wide range of unit types (gaunt swarms, elite lictors etc) - Gloomspite Gitz seem a bit similar, with lots of flexibility available in their roster.