I think a way to inspect someone else’s gear would be a great feature. Since cosmetics are so important, inspecting another character would add another social aspect to player interaction.
However, please don’t add a way for players to view each other’s traits. That would be a bad idea. Some players will always have it in their heads that some professions need to be played in a certain way, and allowing a player to view another’s traits would take some fun out of the game.
For instance, before going into a dungeon, some will inspect their party members, and find fault with their team mates’ buld choices, which would only lead to arguments.