Pro Diplomacy used in a smart way
Different factions will send you quests that may effect your relationship with other factions meaning you will have to choose who best to make a friend or make an enemy when taking these missions. This bit of strategy can greatly change the outcome of a game depending on how well you have chosen who to help and who to possibly make angry.
Pro Leisurely real time combat
The large scale of the game controlling fleets in may solar systems allows for a leisurely pace to play, which makes for worthwhile way of controlling ones ships across multiple places. This makes for less stress in the game due to how intuitive and evenly paced the game is.