A fleet box for the Raiders.
Special rules for customizing your Raiders force depending on whom they are working for or working with.
3rd Space minis/rules.
Maybe an amped up Demos at BAttle and some seriously amped up Vorchans/varients at Raid. Maybe that is a way they can keep all 4 regular Vorchan varients, push the Demos to Battle and maybe the Vorchat or Vorchar up to raid. I would love to see the Dusk Coutari as a choice but I know it will not happen.
More Dilgar ships.
Many more Abbai ships.
Less Armageddon ships.
Rules for vessels carrying Lorien.
More shadow vessels (3 sizes of battlecrabs, 1 each at Battle, War and Armageddon) (2 sizes of scouts, Skirmish and Raid).
Longer range weaponry on the Shadow Scout.
The Shadow Cloud bumped up to Ancient level.
Rules for the Vorlon planet killer, at least. Hopefully a mini and rules. Would love it to be at Ancient level.
Some more work done on campaign rules. I.E. can you give or lend ships to allies? How do planetary assaults effect RR in campaigns? And other questions I am too tired to think of at the moment.
A battle level choice for the Pak'ma'ra.
Historic campaign books such as a 2nd edition version of the Earth/Minbari war, the Dilgar War, the War of Retribution, the Earth Civil war, the Last Shadow War, the Shadow War involving Valen, the Drakh War, etc.
I also like the idea of limitation for fielding ship types.