TL/DR: Get FC to add the ability for users to create the there own texture pack to augment the new engine.
This should be a relatively easy change should Funcom choose to allow it, similar to how the Planet Map works now. Allow the New Client to read textures from outside of the RDB directly from the AO folder, allowing users who wish for a higher fidelity experience to augment there own experience or to contribute towards a community driven texture pack.
Well I am sure some people could use this to a slight advantage in game, (such as making all armor bright pink or something similar to stand out better, or slightly transparent walls) largely the game play impact would be relatively small, and would contribute greatly towards bringing Anarchy Online up to date visually to coincide with the new engines eventual release.
I believe this would also free up allot of developer resources to work on new content, as well as the character models/meshes themselves.
In closing I think this would go along way to help bring a new generation of player into Anarchy as well as giving old players yet another reason to return. We have seen community contribution go along way in the past, and this is just another way we can help.