Oh, cool, I haven't followed the news and didn't knew that already a new Civ 6 was planned for this year.
First of all the AI should get improved. I haven't played Civ 5 for quite some time however when the AI goes for the Patronage Social Policy with City States being disabled then they are obviously not taking the AI very seriously (they might have worked on this, don't know).
As for the settings I hope they keep the classic historic Civ style, Beyond Earth wasn't any fun for me.
For the past civs they made a design decision that the leaders shouldn't act to much like humans but more like the historic player. For example when you are close to victory the AI just let you win and didn't try to Nuke you. I'd like more competitive AI players which still kinda act and speak like their historic counterpart but still play the game competitive.