I want to buy this today on the Steam sale but when I played this on my friends PC, the AI was so stupid it wasn't even worth buying then. But now the game has had the chance to patch the issues, has a majority of the game-breaking bugs been squished? And more importantly, has the AI been improved? I'm talking about the PC version mainly but if it's been improved across all platforms that's cool too.

I don't think the A.I will ever improve in a huge amount. While they do Prioritise objectives better they are still not fantastic at covering the player in the Security Day 6 mission.