So, @Azanor just used ""TC5"" in a forum post about possible changes to the TC node / aura system 
http://www.minecraftforum.net/forum...thaumcraft-4-2-3-0-updated-2015-1-5?page=1116

http://www.minecraftforum.net/forum...thaumcraft-4-2-3-0-updated-2015-1-5?page=1116