Big ship supremacy... Can little ships keep up?

[Makinus]

Suicide Junkie said:
In Gritecon, build cost is equal to size cubed.
So an 800kt ship takes the same amount of time to build as eight 400kt ships.
However, that 800kt ship costs about the same as a single 400kt ship.

If i mod these alterations in the game, would the stock (or TDM) AI work ok? Or they would be at a severe disvantage from the player (assuming a medium bonus).

My skill level: I can beat AIs with low bonus 90% of the time (never make any teatries with anyone, but don´t select AIs x humans), at medium bonus i can beat the ais 50% of the time... and at high bonus i can beat the ais only 10% of the time. Normally i play with medium bonus.