I like the idea of more options for spending the coins from the alliance raids, and the coins are already in the game for 6 of the 9 non-current raids. But adding new tokens for all the older dungeons feels like too much work. They do already have the "you get a drop for your class at the end of the run" thing programmed into the game, and would just need to turn it on for the rest of the older dungeons. Much less work to implement, and it still guarantees you whatever glam pieces you want within a certain number of runs.