Both of these requests have been supported in the past. I hope to see them return.
Johny_Bafak's Vertical Tech Tree
While this is included in the modpack, only the basic layout is presented. Other layouts incorporate most premium and special tanks, allowing a convenient way to learn about tanks we are unfamiliar with. As the rest of the tech tree is organized by tier, the layout that organizes the additional tanks by tier would be best.
http://forum.worldoftanks.eu/index.php?/topic/514277-091511-vertical-techtree-v0943-13-09-2016/
Ashbane's Vehicle Contour Icons
These icons are more distinguishable than the Pogs icons (the other info-rich option), with clearer colors and much more recognizable nationality info. Ashbane himself hasn't updated them in a while, but another player by the name of JoJa15 has. They can be found here:
http://forum.worldoftanks.com/index.php?/topic/479790-0915-ashbanes-mods-contour-icons/