Ultimately, it's a game, we could go either way with it. I think I'm always cautious of retrofitting rewards into content that players might already feel like they've completed but that doesn't mean that's a hard and fast rule either, just something to be, well, cautious of.
In general when it comes to game design I'm usually a fan of having the problem and the solution come from two different pieces of content but I'm aware that can be difficult when content releases can be so far apart, I will say, I'm not aware of any plans for this reward imminently so perhaps that's another way of answering your question.
I will re-iterate though, I do think that the biggest pain point is the need to get more amulets coupled with losing your spot because the game filled up more so than the number of charges being a problem.