The Linux port currently does not support steam workshop, and as the mac port made by the same developers has not received workshop support despite having been out for several years, it is unlikely that it ever will. Though there are unofficial workarounds to get the mods working.
Unlike past Civilization games there are no longer stats on the attitudes of the players surrounding Civilizations. This allowed one to see how each other nation felt about the player, but now that it is gone one has to guess, which is definitely not as helpful.
Some specific traits are unique to each faction. Most, however, can be traded for when customizing a faction, with a point-buy limitation to balance it. The world generation options are all knobs to turn one way or another as you like. Very fun option to fiddle with that can make every game a new...
Short of being a constant aggressor there is really no worthwhile way to win battles. While there are a few different victory conditions non of them really amount to anything as they will not be achieved unless dominating with ones military in the first place.
Upgrading ones units and operations is quite fun and intelligently done. As new equipment is developed the user has the choice to bring their units in, in order to equip them with the new equipment. Not only is this intuitive but it adds to the strategy of the game as the player must decide who and