For a future worms game, the selection box could skip to items that you actually have in your inventory, rather than needing to scroll through blank panels/zero ammo inventory items. It's just an idea.

And if you're on a Ninja Rope, Jet Pack, Parachute, etc., make it so you can quick cycle through your weapons with the L shoulder button. There aren't too many weapons that can be dropped while on a rope, so there really wouldn't be too much of an issue of going through too many weapons.