I have an idea. Currently KA includes alot of various resources from all the games, Doom, Heretic, Hexen; this is done to allow users play KA with any of these 3 wads. But, if the user have at least 1 wad, he already does not need part of the resources (textures, sprites) included in KA. And if he has all 3 wads, he actually does not need most of these resources (except for some KA-specific graphics and things).
So, my proposal is to split KA resources in 4 packages: general one, which is obligatory to download, and 3 packages that should be downloaded only if user does not have appropriate wads. This may greatly save users time and traffic.
What will you say about this?

Sounds good, the only problem I see with this is that it would make installing KA too complicated, download the main KA package, then download the pack for doom if you use it, or for heretic... etc. and copy them to the right directory... user complaints will begin shortly after we do this (support increases in-necessarily IMO).

We would have to find a way to make the installer to download and unpack everything needed, this will make things easier for end users.

These days, the extra 5-10 MB these resources add to the complete KA package are nothing IMO, not just in used disk space but also in bandwidth requirements.

What could be done though is to split the resources into different pk3 files and add an instruction to the manual what package to delete if you have which game.