Like the last edition, Gremlins have diversity to deal with a lot of threats (especially with the rest of the crew in wave 2) if you take the right models. Look at what strategy and supporting schemes you are running. Dropping the war pig for more Bayou may be beneficial for Reconnoiter, however in Turf War and Reckoning you will need to kill stuff and a heavy hitter like the war pig is needed. What is the terrain look like at the beginning of the match? Can you set up a deadly firing range and will your opponent be stupid enough to walk through it? I would encourage you to stick with the war pig and Som’er as heavy hitters for most games (at starter box level) and learn how to maneuver them with the Pig Feed upgrade. It is easy to fall back into a straight gunline crew and the gremlins offer so much more.
After that impassioned speech, Ophelia’s box set offers more model diversity. I would recommend her Kin if you are playing with starter box sets for a while. Francois is a model most underestimate only once.