Why? Isn't that how for example Rise of Nations works? Besides not being realistic, except on particular cases, and for understandable reasons.   Ah, thanks. But I don't get why it's not just right-click, right now that does nothing, and the hovering icon is a crossed flag, making one think it's just impossible to do. Besides, when rallying to other buildings the hovering icon is the garrisoning one, no need of CTRL. Is there a reason why that's not the same for self-rally?

Terrible idea imho.   It can. [+CTRL]

You are welcome to check it out. Our speeds vary more than vanilla, some are faster some are slower.  Cavalry is broken into 4 classes, pursuit/scout cav which are only spearman and are the fastest, then light cav which most of time time is your archer/jav cav, sometiems a light melee cav, medium cav and heavy cav.  The more "armor/resistance" the slower they get.

Reminds me of the Spys in Rise of Nations.

Never thought about this... even when it's like Athens' historical connection to its port (too bad in the game one can build docks on neutral territory, I'd reserve that just for some civs):   Regarding the baking of champions, it does seem to me that's a bit OP, but I don't play MP. Related: why is it that a building cannot be set as its own rally point? Maybe because this strategy in general would become too OP? And yes, Hippocrates is the best, the AI can't deal with the nigh immortal army.