So....it looks like week won't find out what AC would've done about this. I just found out that a relative of mine is driving from YYZ to that person"s city this coming week and is visiting someone near the guy who has my suitcase, so we're just going to switch it ourselves and leave AC out of it.
Just to add, though: Apparently it wasn't only my friend who made a mistake, it was also the other guy too, and AC also messed up in a big way. After speaking more with the guy who has mine, I found out that he actually took my suitcase thinking that it was his and realized when he was checking into his next flight in YYZ. He couldn't go back to the carousel to switch it so he told the AC agent what happened, and the agent took down his info and told him they'd deliver his bag to his city on a later flight and they'd return my bag to its rightful owner. He said the agent then took my tags off my suitcase and put on new ones and sent it off. As it turns out, those tags had his name and address on it and my suitcase showed up at his door this morning. He tried telling the courier it wasn't his but the courier wouldn't take it back, so he contacted me himself. I Have no idea why- after this guy told the agent the suitcase wasn't his- the agent took my tags off the suitcase and put on tags with that guy's name, but bh it seems it's all sorted out now.
Bh it seems my original question won't need an answer.