On the second point: Please have the powers-that-be consider doing a partial release of the parts that are not under that agreement. Some code is better than no code at all.
The situation about cheats is not that simple. Armageddon's way of modelling the game state is already immune to certain kinds of cheats. The current state essentially is a function of the previous state plus player's inputs; therefore, it is impossible to give yourself infinite ammo or noclip through walls. We've tightened that further by e.g. introducing "Schrödinger's crates", which makes the contents of crates determined when they are opened instead of on creation (thus making their contents impossible to predict). The remaining avenues for cheating can mostly be categorized in "perfect knowledge" cheats (i.e. knowing what weapons are in other players' inventories) and input cheats (creating macros or bots that produce frame-perfect input); these are not solvable generally, and can only be protected against either through "security by obscurity", or very intrusive anti-cheat software which analyse which software runs on users' PCs. We would very much like to avoid having to do the latter, as such software can only be effective if it is more invasive than the cheat software itself, not to mention requiring a lot of effort and resources to implement and maintain.
And, yes, unfortunately these concerns are not purely theoretical. Nearly every competitive season we have issues with some players thinking they can get away with using some generic cheat software, or occasionally some curious hackers making some cheats for fun for their friends which then find their way out to general availability.
They require, in the harshest of cases, (1) a full-length video of you actually playing the session, with input methods visible in frame, hosted on a publicly accessible site such as YT or Twitch, (2) game audio must be audible and undistorted, and (3) hardware input tracking software logs - I'm not sure what the application they use is called but you can easily find out. There might be other requirements I forget, you can probably google it easily.
With these things required, the community polices itself. Staying ahead of these things in code is completely wasted effort that could be spent on positive coding, which grows the community and therefore reinforces the self-policing.
These requirements might seem harsh and alienating, but I'd just say "get over it, if you want to compete, these are the rules."
For one thing, Worms Armageddon is a PC game. By design, PCs can run arbitrary software alongside the game, and the game software can be relatively trivially modified to do whatever the user wants. It is practically impossible to remotely prove that a PC is running exactly the software that the player claims it is running.
Second, competitive gameplay in a multiplayer game is very different than speed-running. Though similar variations exist (e.g. time-trial rope races, where contestants can take as many tries as they want to beat a map off-line and then submit their best replay), mostly we're talking about actual online tournaments (often with community-pooled cash prizes). Forcing every contestant to set up video recording and other proof as you describe would make competing impractical for most players.
Third, cheating massively hurts the game even for non-competitive play. In situations such as what I described above, when an easy-to-use cheat program becomes easily available and before we patch it out, many groups of players will download and will use the program. It is very demoralizing when players run into one cheater after another when they're just trying to enjoy a casual but fair game. You can find plentiful evidence of this in other games, which were bombarded by complaints and negative ratings after the developers' lenience to take action against cheaters in multiplayer games.
With a multiplayer game that lots of people are playing online in multiple rounds that's a lot less feasible. Would you ever want to watch a bunch of videos of people playing a turn based strategy game to make sure they're not cheating? Even if you did put these requirements in place, if you suspect someone you're playing against is cheating and ask for the video proof that they're not what motive do they have to hand anything over? For the hypothetical speed runner they need to prove their record so they can lay claim to something which takes a lot of time and effort to pull off. For the Worms player they get to confirm that they didn't cheat when playing some stranger on the internet? Then they have to do this again next game in 10 minutes time? It's just not practical.
