As it stands right now, there is only one set difficulty that one can use for the artificial intelligence in a game, and it might stand to reason that there is no actual push to change this setting. For most people in ranked games or community games as an example, they will see no change whatsoever, but this proposal is not geared towards them.
This proposal is to remove the line dedicated to AI difficulty in the Game Settings, and instead allow the user to set it for each AI player in the lobby. This helps set up games for example where you might have one skilled player with a low difficulty AI ally, and a newbie with a higher difficulty AI ally to help support them. The idea of setting it per AI can also extend to Singleplayer games or campaigns, where you might want to make a certain team more aggressive than another team which is just meant to be the economic peaceful village on the cityside, despite them being enemies with multiple people and having the economy to build a barracks and go ham. It also helps people train against different strategies with different levels of AI interacting with one another, making solo games more unique in how the AI approaches situations, instead of all of the extreme enemy AI going for rushes, or typically advancing at the same times.
As to where to put the difficulty drop-down, I would personally not recommend placing it in the drop-down for players, as that would mean there would be 18 different options in a single dropdown. Instead, maybe the UI in the lobby screen could be slightly shortened when an AI is introduced into the lobby to have another selector (like team) to set the AI difficulty, which always has [-] for players.
I probably won’t look back at this, unfortunately, but I thought an idea like this would be beneficial to AoE2 DE as a whole. This post is just meant to encourage discussion about a topic that I think is ultimately overlooked in the grand scheme of things, possibly something that people don’t know that they want. I would desperately like to see people discuss the pros and cons of this, maybe refute me if I’m wrong, so that we can find a way to better the game, together .
Edit: Clarity.