The trick is going to be setting the correct point values for balance purposes. If we start with Research as the baseline and assume 10 points for 5% increase or 30 points for a 10% increase, what would be the points required for the following. My own suggestions are included but I would be very interested in opinions as well as suggestions for other bonuses:

Research, Engine Power:

5% = 10 points, 10% = 30 points

Shipbuilding, Factory Production (Construction, Ordnance, Fighter Factories and Fuel Refineries), Mining, Crew Training Rate, Pop Growth:

5% = 8 points, 10% = 24 points

Wealth, Terraforming, Survey Speed, Weapon Accuracy, Trade Points:

5% = 6 points, 10% = 18 points

Ground Unit Strength:

5% = 3 points, 10% = 9 points

Steve