As I've already raised in another thread we shouldn't make users download through the installer as its misleading and it can become problematic if the computer the installer runs on has no internet or limited connection ( which is perfectly possible in this day and age ).

I would also offer up a second suggestion that we make a version of the installer that is bulkier, in that it contains extra stuff such as a basic AI SDK, the lobby protocol documentation, mingwlibs, vclibs, spring source code, and a working LAN server.
This way we would have the streamlined spring engine installer, and a heavier installer for development purposes, writting AIs, or lobby clients/bots etc. Those who want cutting edge or want to write engine patches can pull from the official git repo. Those who just want the binaries to play mods and maps can get the streamlined version.