Integrate all of the content from Worms 2 and Worms World Party into Version 5.0 or future
Though it's probably asking for a bit much and not something you care to work on, I think it'd be awesome if all of Worms 2 and Worms World Party could be integrated into Version 5.0 or further, so that the entire Worms Triple Pack would use a single binary and the updated engine. And possibly convincing Team 17 to re-release the Worms Triple Pack on Steam.
Sir Swerving commented
Plenty of things that could be added as optional scheme settings.
*Reactivating Dud Mines
--Homing Cluster Bomb
--Homing Air Strike
Worms World Party:
*Fort mode with team specific forts loaded map.
*Placed Mines don't explode on the team that placed them.
*Wormpot's that cant be recreated manually
--High Damage/Extra Powered Reel (Goes beyond manual settings)
--Super Rope Reel (Doubles rope length)
--Specialist Worm mode (Every three worms is a specialist and cant use anything else)
--No retreat time (Removes Surrender)
--Double strength health crates (Goes beyond manual settings)
--Wind effects most weapons (Self explanatory)
--Energy or Enemy (Worms are poisoned and the damage ticks multiply each turn)
--Slippy mode (Slide more)
--Sticky mode (Slide less)
--Stay away from the edge (Earthquake every turn)
--Falling really hurts, be careful out there (Increases fall damage)
--On the Moon mode (Low gravity)
--David and Goliath mode (First on each team eats half the hp the rest and adds it to its own)
--No weapons, crates only (Crate Shower always enabled)
--Double damage mode (Goes beyond manual settings)
--Crates, crates and even more crates (Crate shower always enabled)
--Using a weapon doesn't end your turn (Self explanatory)
--Everything you wanted to know about the contents of that crate (Crate spy always enabled)
--Twice the clusters (Self explanatory)
Specialist Worm mode would be fun