The reason for this suggestion is that it's been fairly common for awhile now that some people will pick the wrong influence reward item either by miss click or to take an item and realize later that it was the wrong choice.
- The sole reason for doing PvE in the Bastion Stairs dungeon is to get these weapons for how well they perform so this irreversible error can have quite a effect on players trying to get the most out of their class in more competitive forms of PvP while specific weapons that have extraordinary use from the sentinel dungeons are able to be traded in at your leisure either for their proc's or appearances.
- My second reason is that the majority of the classes have 3 options but they're always forced to take 2 which makes players seeking to play multiple variations of their classes spec's or to get those weapon appearances punished.