Reasonably speaking, those arguing that this is zero investment have ignored that it is a multiple feat investment process to reach legendary skill ranks, and very well could be infusing heroes with mythical magical power. Characters from practically all mythologies who are non spellcasters have...
Maybe some of you need to rename Legendary to Mythical to get the idea? Look at the PURELY SKILL BASED or skill plus magic item feats attributed to Paul Bunyon or Liu Bu or Masamune or pick a Legend. Your characters won't have this for every skill, maybe a handful. You can easily cap power tier...