Thrust costs

I've been thinking of a way to make break point cruisers and escorts less
advantageous.

Have each point of Thrust cost:
Mass * (Mass ^ 0.5 / 10 ) points.
A 25 Mass Cruiser would pay 25/2 build points per
point of thrust, or.5 Mass.

A 1 Mass Scout would pay .1*Mass / point of Thrust
4 Mass Corvette.2*Mass "" 9 Mass Frigate.3*Mass 16 Mass Destroyer.4*Mass 36
Mass Heavy Cruiser.6*Mass 49 Mass Battlecruiser.7*Mass 64 Mass Battleship
.8*Mass 81 Mass Dreadnought.9*Mass 100 Mass SuperDreadnought 1*Mass

You could also fuzz the boundaries between classes
by making Cruisers pay +20 for the extra damage
control party and fire control system, and Capitals
+40.  Put a few restrictions on the systems
available for Escort classes, like no A-Beams, and
restrict certain advanced weapons to Capital ships and a lot of the problem
goes away.

The biggest difference is that fast small Capital ships become a lot more cost
effective, and a wide spread of masses for Capital ships can work.

Now, I may be reinventing the wheel here, but I think a simple decimal
modifier for the cost of the engines is the way to go.