We have millions and millions of weapon packs, most of them having the same guns, and that's good because it gives the community the freedom to choose what they like best depending on their preferences over how they function, and how they look, some players prefers hands on guns, some prefer raycast over projectiles, others prefer simpler guns other than advanced with aiming and animations, same thing goes with vehicles, there are a lot of players who likes to have a collection of cars, and some uses specific ones depending on what they're going for, variety is never a bad thing, Garry's Mod is a great example of that, the community never complains about it because there are plenty of mods that gives more variety for all different sides of the playerbase.
But yes, you might expect more non-car vehicles in the next year, that's all I can say for now.