Dramatic improvement. The economic structure of reinforcements now makes sense, meaning campaigns are not about War and Battle-level ships all the time. This does, on the other hand, hurt the Shadows and Vorlons with their double costs. Carriers also get much more powerful, being able to dispatch aux craft to scenarios without going themselves, thereby giving lots of force flexibility. You WILL see patrol-level forces of fighter strike groups in quantities in campaigns from Dilgar, Gaim, EA, Brakiri, and Vree, and possibly Centauri.
The Gaim's super-fighter regen might be a bit too much on an economic advantage; but I'll have to wait on that. That's just a suspicion based on the math in my head, I certainly can't prove it.