Hi. Just like to say that Sins is looking very impressive at the moment. Here is some of the feedback I have after a few hours play. Don't think any of these have been mentioned... and they are just my opinion so far.
1. The Repair Platform's descriptions are confusing. It's tool tips says 'Mustn't be self and have hull damage', which for a while I read as it meaning that the platform must have damage to work. Something like 'Cannot repair itself, and it's target must have hull damage' sounds better.
2. I have noticed a 'seam' like effect on the backgrounds, a pair of parrelel lines from north to south where the texture appears different between them. (Graphics card Ati X1950Pro).
3. Maybe it's just me, but building and research seem very quick compared to how long it takes to gather the resources required to initiate them. A suggestion would be (but I'm not sure how it'd be implemented) is Civ4-like 'Game Speeds', where a longer game has longer production/research times, but units can still move around at the same speed.
That's what I have so far. Really like the Diplomacy, and it's just enjoyable to play =D.