I actually liked the April Fool's joke.
Mostly because it was enjoyable up until one of our teammates BMed the "bots" and didn't hit the nexus for the last bit of damage AND we ended up losing, but w/e
BUT! It was enjoyable because we didn't worry about humans fighting us. We thought it was bots, so we focused on teamwork and improvement. In fact, it was the -best- PvP match I've had in recent memory.
I think enforced disabled cross-chat is a really fantastic idea that should be implemented straightaway, and we should always have the "champion bot" name style (well, maybe not, but it helped with the illusion). I think a game that focuses on teamwork is always at the core of League, and if we just had a game where "let's band together and fight, and then leave" is the idea we should move forward with into the future. No cross-chat in game, no after-game lobby chat with all the players. Let's just get people together to play a game as opponents and then move on afterwards. I think that would be ideal.