i thought mesh swap/import most important now.. And what things u talking about if its not secret ? 
Mesh swap and Mesh import are two different things. Mesh importing, besides the format is far easier to do, because it does not have to deal with moving objects around bundles. So mesh swap is not the most important, its a "would be nice to have" feature. But is reliant on understanding how delayload bundles work and bundles in general are loaded and accessed at runtime.
More important things at this time (Nothing is secret):
- Move import code over to DAI Tools
- Move patch creation code over to DAI Tools
- Move EBX import/export code over to DAI Tools
- Support all types of textures for import
- Preliminary support for mesh import (With major limitations)
- Be able to package patches with textures, EBX, Script, Mesh changes
- Resolve outstanding patch creation errors
And probably others that I have forgotten at the moment, but thats the main list at least