[Wolfman77]

1. Shouldn't cause any major problems. Watch the repair rate with berzerker though, -2 here can drop low repair rates. Ex: If you have a repair rate of 2 in a sector, -2% from berzerker means a repair rate of 1, as they round down. All rates are added first, so 5x2x98%=9 , 25x2x98%=49 and so on. I don't think the AI takes this calculation into account when it builds repair ships.

2. Most of those shouldn't effect them too much, the stock AI doesn't use many troops, nor make a tremendous number of treaties that they would cripple them. I wouldn't recomend lowering happines to much for them as I don't think they can deal with mass riots very well.

3. I have noticed no problems with doing this. I regularly set up the AI with better abilities to make them more of a chalenge. They will make full use of the extra facility slots from said trait, I also recomend the 125% SY trait and propulsion if they can afford it.

4. The AI doesn't care, they will build whatever is available and use it for that purpose.