Georgia Boardgames Association

I’ve played a few games of this now and while I like the game components. I’m not sure I understand why the game is rated so high.  Is it because I have only played two player games?  I’m not really getting the strategy here.  For example, the roles are random so what good does it do me to build one color or another?  About the only strategy I am discerning so far are two things.  One, because of the randomness, one must use logic to determine who might be whom and this would be better with more players.  And, two, whether or not to build large districts with good purple cards.  I have played a lot of San Juan, so I do not know, yet, if I like the random roles.