[Suicide Junkie]

The stock AI assumes that the biggest hull is always the best.
Making any of the changes suggested in this thread would falsify that assumption, and the AI would go down hard.

It would be entirely possible to change the AI files so that it will build a decent mix of smaller ships, however.

---

Combining the gritecon with the other things suggested would be much too far, indeed.
Gritecon's changes stand on their own to make a nice utility curve in which all sizes can be useful depending on the situation.

Long term, you can't support much of a fleet with small ships. Short term, you can't build much of a fleet with big ships.
The shorter the term you are considering, the smaller the ships you will build.