As someone who's been playing dota for nearly 20 years now, it was fascinating to watch it play. Some of it's decision making process didn't seem logical in the short term, but would often be set ups for future plays, even though their observation window was fairly small. Even more impressively was the ai bot changed the meta of professional players, since tactics that arose out of its training ended up being more optimal.
I wish we got to the point where other ai bots were out there, but it's entirely understandable that you couldn't drive a complex game like Dota with LLMs, whereas you can with the ones the Game Arena has selected.