The Importance of Embassies
Have played a little of the Beta, and I'm unsure if I just haven't delved into this enough, but I Hope that Embassies aren't simply used for a small boost in relations. Once embassies are established, there should be the opprotunities to increase relations with the passage of time. One Idea is that Military conflicts do less relationship damage and are slowly decreased over time (as the embassy is able to talk about the situation and eventually move past it). upgrades for an embassy should be allowed giving the ability to do espoinage ( see ship movements, know where capital ships are etc. Just being able to see where there military strength is) as well as the ability to make the people of an empire more friendly. By more friendly I mean that through propoganda the people of a certain empire began to empathize and want to grow closer with yours. While the Leadership (the player) may want to wage war on you, the people will feel it's very unpopular and possibly revolt (which someone else has mentioned in another post), or have it effect the income drastically (the people refuse to fund a war they do not want). The people support will not weign unless the player gives in and stops attacking/ forms a treaty for a time (perhaps the people could even force a ceasefire), or the opposing faction begins to attack his colonies (once the faction that the people are fond of attacks them, they will start to support their own government again). There should also be research to lessen the effects of enemy embassies as well as expelling diplomats/ ransacking the embassy itself. You should also be able to offer terms for ceasefires (Money/planets= peace treaty)
I know i sort of rambled on a bit, but my point is that Embassies need to be extensively used and really give the sense of politics and diplomacy. I stopped playing sins a while ago because I felt that it was too focused on military action and wasn't taking enough from it's 4X heritage (games like Civ4).