In my opinion something that can give skill points, should be untrackable thx.
even if you remove the addons there is plenty of map (even with videos..) of skyshard locations...
all the addon do is just removing the need to "alt+tab" every now and than... or using a second screen/smartphone to look them up while you'r plaing...
You realize the game itself gives you hints and tips on where they are right? If you look at the achievements for the zones under 'Skyshards' they give some pretty obvious hints, and alot of quests take you near them. The add-ons are just making simpler what the game developers themselves did