1)--

What made your game really unique was the "Make Your Own Wepons". This is perhaps the best tool in W4. Now, what would really amaze me in Worms 5 is where you can invent your very own LVL. Basically you use your money to buy the items you need.

2)--

Allowing more people to play with you when you're online.

That's all, thank you,

Danyal

A level editor was planned for Worms 3D but never released. Ditto with Worms 4 Mayhem. All the 2d games have level editors.