I am maxed on notoriety for all but one faction so can only turn in one Sigil of Valor per day. When I exceed 5 in my inventory, I lose them.

It would be nice if Sigils of Valor could be exchanged for platinum or Captured Intel, maybe 5 platinum per sigil or 100 Captured Intel per sigil.

A similar mechanism exists for the notoriety minion adventures where you get a platinum reward if you have max notoriety for all factions.