I never thought about this, interesting idea. I sometimes like to make my schemes not so serious, or easier if possible. And I agree that the learning curve of this game is not easy.
I realized in Mar del Plata that to begin to play Counter Strike 1.6 is easier to learn than WA. WA takes a lot of time to learn how to select weapons, what the weapons do, how to master them, think on all possibilities the other player can do, plan a strategy, learn the perfection of the pixels, etc. Maybe an "easy mode" or this idea of a controller might help beginners (or party games). Maybe introduce the manual inside the game like WWP's Wormpedia (or a "game controls" tab when pressing esc, to check in game how to use Worm Select). How to use zook, how to send private messages, Shopper Rules, how to select the time of a grenade, how to make the grenade bounce, how to backflip, etc.